We took our car to Meineke on Kietzke Lane for an oil change. When we picked up the car, we were told that the rear main seal was leaking, which is a costly repair. We took the car to another shop, and we were shown that the leak was coming from a cap on the oil filter. The other shop was able to determine where the leak was coming from in less than 5 minutes and said that it was obvious that the leak could not be coming from the rear main seal. We had this shop order a new cap to fix the problem. I was concerned that Meineke had made this mistake and wanted to let the management know, so I called and spoke to the manager. He had a negative attitude from the beginning of the call. I told him that I just wanted to let him know about this so that he could possibly prevent it from happening in the future. He argued with me about how the other shop found mistake. I remained calm and polite during the phone call, while he told me that he did 60 oil changes a week and did not need this. He also told me, in an extremely rude and condescending tone, that he was glad that another shop could make me happy. I told him that I was just calling to let him know what happened at which time he told me that he ran an honest shop and he did not need to talk to me anymore. Then he proceeded to hang up on me. In my opinion, he acted in a very immature and unprofessional manner. After this conversation, we learned that the oil cap that was leaking comes attached to the oil filter. There is no way to take it off. Our car was leaking before and after the oil change. I was told that it is extremely unlikely that two oil caps would have a hole in the top causing the car to leak, so I believe that Meineke did not change the oil filter, which we were charged for and is standard on any oil change. I am disheartened about this situation and am extremely disappointed in the actions of this business owner. Unfortunately, this business has given Meineke a dishonest and unprofessional standing in my opinion, and I will not be returning to Meineke in the future.