HomeChoice selling damaged appliances

I am really disappointed with HomeChoice. I ordered an Empisal Serger 9D from them and I was pleased when this item was delivered quite quickly. I also gave HomeChoice a great review of their service. 3 weeks later, after using this item 3 times it has now malfunctioned without reason. It's begun to make weird sounds and it is no longer sewing. I require this item for my business and now I am stuck with an item that no longer functions. When I first received the item, I saw that it had previously been returned by another customer but I did not think anything of it because I trusted HomeChoice (HomeChoice did not bother to take the previous customers return receipt with all his personal information out of the box before giving me this item). I still need a Serger so I would like a replacement unit but if HomeChoice cannot honor this, I will need to take a full refund for this item and buy it elsewhere. This is extremely disappointing...