SHOCKING AFTER SALES SERVICE

I bought a lounge suite from Rochester Furnishers, Stoneridge Centre in late November last year. There is a factory defect on one of the cushions (it has two centre stitchings instead of one, and the stitching is also loose). I have been trying repeatedly to get this cushion exchanged. The salesperson Walter initially told me to just bring it in and they would swop it. The manager Zane refused to exchange it and said that the factory would get hold of me to swop it. The factory did get hold of me but said that because it was just the cushion and not the whole lounge suite the store would need to sort it out. I am frustrated that no-one is sorting out this factory defect. The after sales service here is shocking!!!!! DO NOT DEAL WITH THIS STORE