Poor quality mattress and terrible customer service Dial a bed Alberton Redruth.

I purchased a Forty Winks Revive base set and mattress for R7593.50 on the 27th November 2019 from Dial A bed (reference 8869) . The mattress is sagging on both sides and it is sagging so much that is is hurting both my husband and my backs. When I asked for a replacement from Dial a bed the company said I need to R2075.00 for a replacement mattress - after I complained on Hello peter they then said I can swap my mattress for a mattress of similar price- however because I bought my mattress on a black friday special they still wanted to charge my R1000- as the manager at Dial a Bed Indira Lalloo said "the price of petrol has increased so we have to charge you" . Please do not buy from dial a bed , we still are sleeping on our sagging mattress even after logging a dispute with them- they do not offer quality products. They also tried to convince us to buy even more expensive products and return our base set, as they wanted us to "upgrade". I really do not appreciate the poor customer service I have received from them . They cannot even resolve complaints and reply to emails timeously.