Charge for mounting tire to rim

I understand what all are saying. However, the flat was in my driveway. GSER uses Goodyear service centers which I am NOT crazy about. The provider came from 40 miles away(smaller town than mine). OK maybe my town service center does not have a truck(I know they used to). I am not complaining about the mounting fee itself I am complaining about the amount. In the past when we had a blowout the service provider would call us direct after GSER contacted them and any charges would be paid to the service provider. I have a problem charges made to GSER without having an itemized receipt. Two years ago we had a blowout on Sunday afternoon on a busy interstate. That is when I found out about the contract with Goodyear. I do not use Goodyear for personal reasons. We are retired from Goodyear. The charges were put on my CC and it included a $125 disposal fee. No one with GSER has ever been able to tell me why. I did get a refund because I was told I was charged too much for the tire. I have questions with no answers. Yesterday a rep. called for me to renew my membership. While talking with the gentleman he tells me I should not have been charged anything. GSER pays for the service call. Then he tells me I have to pay all labor charges. Ok, no problem. My problem is The provider himself told me $35 but GSER charged $130. I would like to know why the difference. That is my question. Up until 3 years ago we paid GSER nothing. Any charges were paid to the provider. Just have questions.