Quality disappointment

So disappointed been trying to get a hold of the company but with no joy. I purchased my U shape sofas a year ago but sitting on the couch is so uncomfortable. It's like the sponge is not of good quality. Cannot sit on one couch for long cause literally the backside hurts. I spent R12 000 on these couch and I was assured my couch is on warranty once purchased. This company is no longer on Peter's Road, Durban.