Poor after sale service at Russell's Furnitures

I purchased a set of couches from the Russell's Rustenburg. Within 2 weeks of purchase, the single seater fabric started to wear off. They came to pick it up and kept it with them for several weeks. When I eventually decided to contact them after weeks of silence, I was told that my couch got damaged because of a detergent I used on it. No proof given and no answer as to why this detergent I used would only affect one couch and why would I need to clean the couch within such a short period after purchase. My complaint was logged but nothing after over 3 months now. The sales team is very persistent and walk an extra mile to make the sale, but thats where it ends. The store then applies their "Don't care" policy thereafter. I read their values on the wall, the are going against their own values.