Poor service

I bought a queen size Sealy Columbia bed in May 2026,I've been rotating the bed every two week. The one side you can see signs of sagging and the other nothing. I filled a complaint and was told it's body impressions, the port holes are visible and the stitches are becoming loose aswel. They told me they don't find any fault. I have been rotating the bed. They never send anyone to check the bed it is very frustrating to pay for something that is not of the best standard, I cannot be complaining already about a bed that has been used only for 2 months full.