Sagging mattress and What after sales support??

We bought the Cloud Nine Chateau in Oct.2017 A year after we bought it we went back to the retailed and complained that the bed is already sagging too much. A rep was sent out to analyze the mattress but the report came back saying it is normal for the mattress to have the indentations. Sept. 2020 we contacted the retailer again because the mattress is sagging even more now. The rep was sent out again. Again, we received a letter that there was no defect found with the mattress. This is total BULL. We have several other mattresses that are 7 years+ that doesn't look anything like this mattress. The average lifespan of a mattress is 7 years, this is not even half way through and it looks like this. What will it look like in two years from now. I rep**** to the sales support that I am highly unhappy with the feedback or should I say the one small paragraph saying " no factory defect was found". I sent another email last week with a photo attached asking for some feedback and a solution.

One would think that in the current economic crisis we are in it would be important for businesses to offer excellent customer service and after sales support because you want clients to return to your brand and even market your brand by word of mouth. This is how you will make your business survive. Reading all the complaints here just proves that Cloud Nine doesn't care about their future or their customer satisfaction. Clearly they don't need our business.