Appalling Service from sleepmaster

I bought a Sealy bed from sleepmasters in vincent in East London on the 27 of November 2024 and picked it up on the 30th of November from the store. After a couple of days sleeping on the bed it sagged significantly on both sides of the bed and made funny sounds. On the 9th of December went back to the store to report the bed and had pictures with me, the manager of the store did not want to even entertain me and said i must take pictures of the bed naked and send to the supplier myself. This confused me as to why i would have to deal with the supplier myself and them. I called sleepmasters head-office to inform them about the appalling service i received from the branch and manager. All my details were captured i should assume and sealy beds did contact me and i sent pictures to them. On Monday the 16th i made a follow up with both sealy beds and sleepmasters, sealy did confirm that they did send a credit note to sleepmasters to change my bed, sleepmasters said that it was showing on thier side and the branch would contact me. Four days later No communication from the branch what so ever. Today called the sleepmaster headoffice again and spoke to a lady that said there is nothing they could do i must deal with the branch i bought the bed from, she would assist if i bought the bed online. I called the branch, with no expectation of recieving any help as they have no customer service what so ever and no regard for q customer who is in distress, they have taken my money and couldnt care less what happens there after. Can sleepmasters give me back my money so i can go buy a proper bed at a store that will appreciate my money, please iam tired of this..