Imperial Auto Services / Car Computer Exchange Send you a bad part, accuse you of " just testing" it, will not refund Cary North Carolina

 Ordered a part with this company 11/2013.Part did not work.Sent it back, was told I would get a refund.They will not give me my money, they have part. I ordered a powertrain control module from this company in November 2013. They asked me the specifics for my vehicle, needed by them to program this part, per manufacturer requirements. I received the part, it was not compatible with my vehicle and did not work. I was told to send it back and they would check it. I sent it back and had to call for the status and they asked me if I just wanted a refund or did I want them to try to reprogram it. I opted for the refund and was told I would receive it. I have had to call a half a dozen times to find out where it is, they kept telling me they would get it processed and still nothing. I spoke to a manager yesterday and they just emailed stating that they are not actually going to issue a refund because they've accused me of just "testing" the part and that negates the refund guarantee,and they have the part that I paid for that did not work, as guaranteed. I now have no money and no part and this is considered satisfactory business dealings by them.