Meineke Car Care Center

I took my car in to check my Ac. They told me I needed a tension belt. So they ordered the part when I came home I looked up that part it wouldn't fix my ac problem. Also they charged me 490 for a part that is 201 next door at the auto part store. I just want a refund for the work I will not get done Thur them. They charged my credit card before they did the work and now they refuse to refund. It's annoying