Faulty Mattress which cost R15000.00

I bought a R15000.00 mattress from Essop at Mall@Carnival, they delivered it but the mattress was faulty, one side it does not have internal supports. I reported it two weeks ago and nothing has been done. Now I have to sleep on the children’s room because of their internal processes which takes too long. They must just come get their mattress and give me a proper one.