Don't deal with Dial-a-bed

We purchased a Simmons matress on January 2, 2020 from Dial-a-bed Stone Ridge (Greenstone), for R11k. They supposedly offer a 100 night warranty besides the 6-month product warranty offered by Simmons. Within about 60 days the matress developed hollows where we sleep, almost as bad as the matress that we had replaced which was 6 years old. (Neither of us is overweight). I contacted Dial-a-Bed via their online chat on April 10 to register a complaint, the consultant said that they would escalate the matter to the regional manager. I received no further communication from Dial-a-bed so I followed up with an email to the customer service email address, in which I included a transcript of the online chat. Since then I have had no communication or acknowledgement from Dial-A-Bed. I can only conclude that this company and the products they sell are to be avoided at all costs.