Purchased car with engine replacement

Do not purchase a car through this business. My mother and I purchased a car from Perks auto parts and salvage and had them put an engine in it . After I received the car it lost 3 quarts of oil in under a months time I was told to send it back to them so they could look at it. He kept the car for a month and a half without doing anything other than driving it and then got rude with me stating that I was making things up about the car. It turns out that the oil pan gasket was blown as was the transmission gasket which is now getting fixed . Upon filing with the Better Business Bureau be owner Chris and his wife Kathy stated that I was not the original buyer therefore they didn't sell me a car . This business is dishonest and corrupt not to mention having no business sense and how customer service is supposed to be carried out .