A couple say they're 'frightened to death', as their kitchen sinks lower and lower into the ground.
Janice Hart, 73, lives with husband John, 79, and says the problem has got worse over the last couple of years.
"If you walk from my front door, through the hall and then onto the kitchen floor you'll feel it," she said.
"It goes into a slope. It just makes you feel sick.
"The worktops have gone down so much now that you can even see the wiring. Even the cooker's on a slope."
Mrs Hart - who has lived with her husband in Windsor Street, Stapleford, since 1965 - said the problem was worrying - but they're facing a battle to find out what's causing it.
"I am just frightened to death of getting up one morning and there's no floor or everything's gone down," she said.
"It's just moving all the time."
Mrs Hart, a retired shop assistant, said they were covered for subsidence - typically when a home collapses, or sinks lower, taking a building's foundations with it - as part of their home insurance with Lloyds Bank.
However, after several visits from insurance staff, she said the company hadn't been able to say the issue was to do with this.
"We rang the insurance (company), they came out. By this time the worktops were going," said Mrs Hart.
"They came out and he (an official from the insurance company) said 'oh, it's settlement'.
"(I said) 'how can it be settlement when the property's 52 years old?' Which it was then. He said 'floors have to settle'."
She said she was told by the insurance company that the problem was not subsidence and "there's nothing else we can do about it".
Work has taken place to repair a drainage system outside the property in a bid to improve the situation.
But this, Mrs Hart said, did not help the situation.
Officials from Severn Trent Water have also been to inspect the house.
But a spokesman for the water company said there were "no issues on our network".
Mr and Mrs Hart have also had advice from an independent property company.
A letter sent to the couple from this company read: "The insurers have not investigated the cause of the kitchen floor dropping but have assumed poor fill material.
"Likewise with the drains, they have repaired them under accidental damage but have not identified the root cause of the damage."
It added: "We empathise with your situation and feel that the insurers have not acted correctly."
Mrs Hart said she wanted "somebody to come and sort it out".
A spokesperson for Lloyds said: "We’re sorry for Mr and Mrs Hart’s experience with Lloyds Bank Home Insurance.
"Whilst their claim remains declined, a decision has been taken to carry out another visit of Mr and Mrs Hart’s property so that their complaint can be re-investigated."
