Enough is Enough Now!!!

I bought A car in 2013 from EJX Auto the service was bad from the start and when the did deliver the car the registration documents was not with. I was told it would be delivered to me in the following week. every time I called I was told someone would call me back. In 2014 when the licence disc expired I went to licence department to try and renew the licence disc but they informed me that the car was still registered to EJX Auto. I phoned and was again told someone would contact me. I then went in and said someone best help me now or I will open a case against them as I have proof of payment it was a cash deal. I then got told to speak to meshay(not sure of spelling) I spoke to her she claimed they needed to request duplicates in order to process the change of ownership. I was phoning weekly when all of the sudden no answer only to find out the have closed down. I have tried to resolve the situation in the most peaceful manner however I have no had enough. I am stuck with a car I can not sell as technically it is not mine, and I can not drive it as I get a fine each time I am pulled over I get a fine for the expired licence disc. Now its attorneys and police station