Lokey Subaru of Port Richey

I purchased a used car with a 30k miles on it and a clean Car Fax report. After driving away, there have been various indications that were not evident during test drive that are surfacing, and should have been caught during a dealer's pre-inspection. From a leaky engine motor mount, to the latest being that the car was in an accident someone tried to cover up. I've communicated with my sales person (Shevon), sent emails, and getting absolutely no support. I guess Subaru doesn't have good standards for their dealers, and I feel cheated.