United Luxury Motors sold me a defective car, now I'm buying a new engine less than two weeks later in Stone Mountain, Georgia

I purchased the 2005 Kia Amanti from this dealership on February 25.  On March 9 the car broke down while I was driving it.  I had it towed to my mechanic who has determined that the engine will need to be replaced.  He said that engine failure was caused by lack of oil pressure.  He also told me that I could not have known about the lack of oil pressure because someone had disconnected the oil pressure warning light.  Consequently, driving with low oil pressure caused irreparable damage to the engine components.  Now I am forced to buy a new engine.
 
A disconnected oil pressure warning light would appear to be a deliberate attempt on someones part to deceive the buyer about the condition of the car.  Though I purchased the car As-Is with no warranty, I have incurred significant repair costs less than two weeks after purchasing the car by what appears to be deceptive selling practices.

I emailed William, the General Manager at United Luxury Motors, on 3/14 detailing my complaint and seeking compensation for my repairs.  William left me a voicemail on 3/16 indicating for me to call him so that we could work something out.  Upon receiving his voicemail, I called the dealership numerous times numerous times over the next several days and each time I either left my name and number with one of the employees for William to return my call or I was told to call again later.  I have had no success in contacting him and my subsequent email has not been responded to.

Either United Luxury Motors has not intention of standing behind the vehicles they sell or communicating with their customers is low priority.