Beds inferior product

I have purchased 3 x Sealy Columbia Firm BSets from Sleepmasters Lambton on 05 July 2024. There's is nothing firm about these beds. Product is inferior and has started collapsing after only 2 weeks. Thought it would still settle by mattress rotation as instructed but it only got worse. I have numerous pictures over this period stating the fact Was told to report it to the store, which I did but apparently the owner/manager wasn't available and would contact me, still waiting and it is going on 5 weeks.