unable to exchange/repair factory defective couch

I bought a full leather couch in August and after a few weeks i noticed a few cracks showing on various seat shoulders and called Rochester to come fetch and fix the couch. They advised to come and collect but up to now i am still battling to get assistance. I have made several phone calls and spoke to the shop manager who assured me that he will drive the call but did nothing. I even went to the shop personally on the 29th of Nov to express my dissatisfaction and i suppose they just didn`t care as my hard earned money was already floating in their bank account. This is very ridiculous considering they sold me a non standard leather item. All i want now is my refund and they can take their defective couch as they have proved not to care after selling their goods despite the warranty and guarantee they preach.