Disgruntled customer

I purchased a slumbernite bed from the mobeni store in November 2023 and have complained more than once that the bed makes a noise when my partner and I are doing the business. I have more than once had a problem with the same bed. The salesman keeps telling me that the supplier says he must come test the bed. Which is ridiculous. He is not doing the business with a person on the bed but just comes and sit on the bed. He finds no noise.They refuse to change my bed which has a 20year warranty. He says the supplier refuse to change the bed. I keep asking them to give me the suppliers details. They refuse. How can you help me get joy out of this as it is a real mood killer when the bed makes a noise when you getting jiggy with it. I have complained before to hello Peter and did not get a response.