No response from warranty division

I purchased a queen mattress and base in 2021 from sleep king, I purchased the set with the original sealy base, followed every instruction about rotating and mattress care but now my mattress is like dipping on one side. I have owned sealy mattresses previously and my family has been using this brand for many years, we haven't faced this issue before. I definitely know that my mattress is defective. I never had to ever use my warranty for this brand before but now when I try to, I get no feedback from Bravo brands. I have sent an email through on the 4th of August and was told telephonically that I will receive feedback by the next day. After calling several times and getting promised that the agent I emailed will get back to me I am now frustrated with the incompetence im receiving. I have not gotten a reference number or any acknowledgement or progress regarding my claim. I have a severely pregnant wife who is using this mattress and unfortunately I dont want to purchase another mattress to be put in the same predicament again. I would not want to ever switch the brand because i trust sealy. I would really appreciate my matter to be attended to.

A loyal sealy customer.