Quality and bad customer services

I bought a Sealy bed at Bradlows in November 2024, the matress is sagging. I informed Sealy and they said I should communicate with the store that I purchased the bed at. I immediately went to Bradlows Eastgate and reported the matter. I was told to send pictures and I did that too. It is almost two weeks and there is no attendance to my matter. Really disappointed at Sealy too, How can a mattress sag like that.