A key worker claims her weekend at Pontins was ruined by "filthy" grime-encrusted doors and a old food on crockery in their apartment.
Lindsay Adams, 47, and her partner, Martin, 56, had booked a short break at the Brean Sands resort as a getaway after their wedding was cancelled in June.
But the nurse and care agency worker said their trip turned into "like something from a film" as one stomach-churning find led to another.
Mum-of-six Lindsay said even their arrival was "chaotic" as the reception area was filled with around 80 people trying to check-in - claiming there were very few social distancing protocols in the resort.
Instead, on arrival, staff had simply placed a bottle of hand sanitizer in the reception area as dozens of guests mingles around one another.
Speaking about their experience, Lindsay, from Basingstoke, said: "When we got there we were told at the gate to fill in a form and go to reception.
"I got to reception and it was in the arcade and the queue to check in went all the way out to the door - there was around 80 people trying to check in.
"There was no way anybody could socially distance and they weren't operating any form of two-at-a-time system.
"All they said was 'here's a bit of hand sanitiser and there you go'."
After finally checking in, Lindsay said their experience went further downhill when they were sent to the chalet and noticed the thick dirt plastered across the front foor.
Lindsay added: "The front door was absolutely filthy and so obviously hadn't been cleaned in months -years even.
"It had dirt all over the front handle and the windows."
Lindsay was so horrified by the state of the door she paused to take a short video of the filth.
The couple then claim they were hit with a foul "musty smell" as they entered their self-catered chalet.
In a desperate attempt to mask the smell - despite it being one of the hottest days of the year so far on Friday, July 31 when temperatures reached 36C - they were forced to put the heating on.
Lindsay added: "I opened the door and the musty smell just hit us and wehad to open all the windows - which we had to bang hard on - just to get some air in.
"We even resorted to putting the heating on to try and desperately get rid of the smell."
Lindsay also noted the carpet was littered with small bits of rubbish and crumbs from previous guests.
The couple had opted for a self-catered double room and chose to have bedding provided by Pontins instead of taking their own.
But Lindsay said the only bedding that had been left for them was four cover sheets and one pillow.
She also said there was no aerial on the TV.
After trying a helpline number given to them at reception, they were met with a message saying the mobile phone was off - and remained off the entire weekend.
Despite asking for new bedding at reception before they headed out that night, Lindsay said it never arrived and they were forced to sleep under a single sheet and share one pillow on their first night.
For their first morning at the chalet, Lindsay and Martin planned cooking breakfast for themselves - but ended up going out to eat after finding old dried food on the crockery.
Lindsay said: "We woke up the first morning and I went to cook breakfast but couldn't use them because they were covered in dried food.
"Again on our way out to buy breakfast I complained at reception about the dirty utensils and again told them about the aerial and bed - again they said both would be sent to the room."
When the couple arrived from their day at the beach on Saturday afternoon - again they found no bedding, clean utensils or TV aerial in their room.
However, Lindsay said a short time later a maintenance man did arrive with a new aerial to fix their TV - claiming he was the only member of staff who appeared aware of coronavirus safety measures.
Lindsay said: "He was the best part of the trip, he put his visor on, mask and gloves on to come in and set up the TV and then showed us how to work it."
After returning from their night out on Saturday evening, Lindsay said their nightmare weekend got even worse when rowdy crowds gathered outside their chalet and started playing loud music.
Despite the disturbance coming from other guests, Lindsay said Pontins staff did nothing to stop it and the noise, swearing and drinking went on until 4am.
Lindsay added: "We got back to the chalet about half 10 and then the music started at about 11. I don't want to sound old when I say this, but it was so loud and such terrible music.
"It was full blast and I even heard one man in the crowd almost bragging about how he had found a bag in the arcade and was encouraging someone to steal from it."
Lindsay, who said he felt intimidated by the group, said she tried throughout the night to contact the helpline but again, the phone remained switched off.
After a restless night, Lindsay and Martin decided to pack their bags and leave at half 7 in the morning.
Lindsay said they were so horrified by their weekend experience, they didn't even stop at reception to complain - and bolted from the resort.
Lindsay said her Pontins Brean Sands experience was "like something from a film", adding she "can't believe these places exist".
She has since contacted Pontins with her complaints and says she has received a reply acknowledging her email, but has since had no contact.
Pontins have been approached by the Mirror for a comment.