MrP online

I bought something online. Made the payment and a day later when I wanted to check for the status of my order, it said cancelled. I called in and they told me their unable to trace the payment so I must send a proof of payment. I forwarded the proof of payment then they told me I must I must go to my bank and tell them MrP are unable to trace my payment. The bank told me the money is out of my account and there's a proof of payment , so MrP told me once again they are unable to trace the payment. Everyday since I made the order, I had to contact MRP. If I didn't contact them, I didn't hear anything at all. This morning they phoned me just to tell me again, they cannot trace the payment, but the referred it to their finance department. Same story the whole time. It's been one week already.