Complaint Review: Mercer Auto Car Care

I was sold a SUV that was a Lemon. On my initial test drive the car ran good.  After the inital once over they kept finding problems that they say they were fixing then kept the car over 2 weeks to make it run until I left the shop. 
Found out the engine was replaced with an engine that does not belong in the SUV. There are missing parts and damaged/worn parts. Since the engine does not fit the car, they jerry-rigged parts to make it function temporarily.
Then on top of that they do a hard sell to purchase their extended warranty policy to do the repair work at a later date.  Also was given an unsigned title from previous owner. 
An independent mechanic has pointed out all the flaws, which are numerous. I ran a Carfax that showed no problems listed.