Has anyone had experience with trying to get a credit from Dollar after the fact? Here's what happened. We had a rate confirmed before we left plus a coupon for a free upgrade. When we arrived there was no upgrade available (another question: Has anyone actually received a free upgrade?). They offerred us a 10% discount-no problem. When my MC bill came in my discount should have been $28 and they gave us a $3.00 discount (1% not 10%). I have emailed but haven't gotten an answer yet.