Engine repair service near White Hall, SC

BEWARE! We have been a customer of this Service Center for years ... until today. Two weeks ago we had our oil changed, filter, tires rotated the works, at which time we requested Mobile One Oil. Today we found a melting bottle of valvoline low grade oil melting on our exhaust manifold which is next to our oil spout. We immediately went to the owner and asked if perhaps there had been a mix up. Instead of customer service we got a defensive attitude and could care less response to our concerns. We were not looking for an addmission that the wrong (lower priced) oil had been used, but some amount of concern and for the owner to check into it and correct the problem. It would appear to me that perhaps this is standard practice, the response to our concern was well prepared and came out will well rehearsed. It was as though they have been through this with a customer before. I do not understand a business that will lose a long standing regular customer and not even try to correct the error. He suggested the bottle of oil was laying on the road and bounced up into the motor!!! Okay guys come on you surely can come up with something better than that. There was no answer given as to why the wrong bottle of oil was left melting on our engine. Common sense would lead the average man to believe it was put in the motor and left behind accidently. All we were told is that now it is in the motor there is no way to prove it. Customers beware.....watch that the right motor oil is being put in your car at THIS service center.