Austin Expo Cars

I purchased a vehicle around Sept 2019. I paid cash in full for the vehicle. I have not recieved my title, and plates and tag for the vehicle. I have been giving 3 buyer tags that I was told by DMV they were illegal I was to only receive 1. I have had to change my phone number in order for them to answer my calls. They were also to put me in a loaner and make proper repairs to the vehicle that they had failed to do in turn causing more damage to the engine. Current temp plate expired Feb 3, 2020.