Disappointing service and customer return

I purchased a queen bed in July 2023, told the sales person I have back problems and she told me that the this certain bed is best, so I took her word and purchased in. In August 2023 I went back to store and said the bed is not right, causing my back to be worse, was told she will look into it (This is the manager) - nothing came of it. Again a few months later went back to complain, again nothing. Went in February 2024 to purchase a fridge and told them again, this time it was a different manager, again nothing came of it. I then decided to call Head office as I am currently sleeping on my couch due to the pain the bed causes my back, this was 21 May 2024, have had a few calls and was asked to email photos to the customer care email, which I did on 3 June 2024, another manager Pinky called me on 10 June and said she is busy speaking to head office to arrange to bring me a bed, I explained to her that I don't want the same bed as then what is the point? she advised she will speak to her boss and get back to me, again to nothing. I saw Pinky now and I asked her what is feedback she said nothing. I told her I was going to Hellopeter and the man with her laughed. I am paying for a bed that I am unable to sleep in, I have been in hospital for pain treatment for my back and currently sleeping on my couch. I need this sorted ASAP!!!!