SAGGING MATTRESS

I bought a restonic queen sized bed (Restonic Vegas 152cm base set) on 02 May 2025 from OK furnitures, by September one side of the bed was already sagging (I believe I was sold a defective bed), when I went to the store to lodge a complaint l was asked to send pictures which I did and was told that the bed isn’t sagging. They did not even send someone to physical come and inspect the bed and see that it was in fact sagging. I was told to “turn the mattress upside down”, which lets me know that even they don’t know the products they are selling to us because that mattress isn’t one that can be turned up side down. I am now sitting with a defective and sagging bed.