Russells sells poor quality beds, Bamboo beds

Hello Peter, I purchased a Bamboo double bed cash online, 22 September 2020 from Russells. The bed was delivered 10 October 2020 after numerous follow up emails regarding delivery. We started using the bed from mid November 2020, after moving into our new home. The bed felt great to sleep on. It's now 3 months later and the bed's mattress have like dents. You literally roll to the middle of the bed. I've written several emails to the manufacturer of the bed and Russells starting 14 January 2020 wanting to if it's normally the case with these beds to be of bad quality. Russells has to date not responded. The manufacturer of Bamboo beds have asked for the invoice with every email I wrote to them and asked for the invoice of purchase, which I've sent as an attachment from the very 1st email to the owner, Hendrick Nell. Aldridge Petersen responded asking for the invoice of purchase once again, which I sent through again and 3 times again afterwards. Busisiwe Sowazi finally responded with a repair request reference no. ***-COZY-*** on 22 January 2021 and that the matter is being investigated and that they will get back to me. It is 11 February 2021 today. I'm still waiting once again. Russells to date I have heard nothing from. At this stage I would just want to be refunded and am not interested in any repairs or replacements.