www.volvo123.com / Still no legal papers from the seller

I think that the company www.volvo123.com has scammed me. I bought car from them, but these scammers still haven’t provided any legal papers about the purchase. Each time they found some different excuses and explanations, why these papers were still in process. I have already paid for everything, what they asked to pay. I feel so nervous and no idea what to think now. Please, help me.