Cars proection plus Cars warranty after market warranty Internet

I recently bought a car, used, from a dealership. It included a warranty for 90 Days or 4500 miles. The dealer told me that it would cover anything that went wrong with the car during that time. After only 120 miles, the engine blew. I contacted the Cars protection plus and they gave me a huge run-around. They want me to authorize work to be done that is unnecessary, and they want me to pay for it. In the end , if this isn't covered, this will cost me over 50% more than the original cost. Before buying a used car, find out if they use this company, and if they do, I highly advise you go to a dealer that doesn't. This company is basically a scam.