Damaged couch and Coricraft is not resolving this

The couch was delivered on 15 March. There was a pen mark on the couch and bad quality leather was used. I have immediately called and spoke to Fiona who gave me the supposed Quality Assurance Manager's details, Kgomotso, whom was found to be a clerk only. I lodged the complaint on 16 March and Olga, the actual Quality Check Manager, and Selloane are yet to respond to my complaint. I have sent several emails and went to the store twice however no luck. It has been 2 weeks now and no response. I'm very disappointed as to how Coricraft deals with customer complaints and the fact that the customer is not satisfied with the goods. It would appear that because we already fully paid for the couch this is no longer Coricraft's problem just as long as they get money.