Complain about Decorfurn furniture

I bought two dubbel seater recliners from Decorfurn in Durban. Within a few months the seats start to sag away from the console. I approached them and two months later it was replaced. Unfortunately after three months I had the same problem. In November I contacted them again and in Feb 2018 I was told that they will send it in to be fixed. They said that they will have one at a time. The first one was returned and the second was taken to be fixed. Before the second one was returned I had the same problem. It is now May 2019 5 months after I complained and the problem is not solved yet. Both recliners was send back twice and the recliner @ home will have to repaired again. I spend over R17000 and they don't seem to be able to solve the problem. I visited to store on numerous occasions and send about 20 email mostly with no responce.