I had a customer come in for some work to their truck, the truck obviously had many things wrong with it when it was brought in. I fixed what we agreed to be fixed, and actually knocked $50 off the agreed upon price. Customer is happy with the work that was done when the truck is picked up, and paid with a credit card. Customer calls 10 min later saying that I broke some of the things that were obviously wrong with the truck when before he brought it in. He then disputes his credit card claim.
My question is this - Regardless of the type of payment, the customer should file a civil suit instead of disputing the card payment. I should still get paid for the satisfactory work we agreed upon, and the other is a separate matter. Is this the correct way of thinking?