Worst customer care service.

I bought a Restonic Bali bed from Sleepmaster Soshanguve block VV early this year Feb/march 2023 and the bed is sinking . I've reported mu query in November and shared pictures of the sinking bed. They've insisted that i pay delivery fee of R350 FOR THEM TOO REPLACE THE CURRENT BED, as when i bought the bed I've collected with my own transport. The bed is not comfortable and resulting to back pains . RESTONIC BED IS BAD AND ****!!!!!!!!!!!!!!!!!!!!!! The type of customer service one receives from Sleepmaster soshanguve is bad, whereby i have to call them always to follow up on my query.