It sounds like your time isn't worth very much that you're spending so much effort to continue this conversation over $10. Or $40, or whatever it is you feel entitled to. Tobin's always provided us with good service and quality goods.
Further - what is Tobin supposed to do? You didn't demand a free repair in your email, in fact you offered to pay for the repair and expedited shipping. In my world if a customer doesn't ask for something for free, they sure as hell aren't going to get something for free. You offered to pay, so he charged you. Had you come at him explicitly voicing your expectation not to be charged you might have a foot to stand on.
No one can read minds.
Further - what is Tobin supposed to do? You didn't demand a free repair in your email, in fact you offered to pay for the repair and expedited shipping. In my world if a customer doesn't ask for something for free, they sure as hell aren't going to get something for free. You offered to pay, so he charged you. Had you come at him explicitly voicing your expectation not to be charged you might have a foot to stand on.
No one can read minds.