basically i put down a deposit on a car almost a month ago. the deal didnt go through (not my fault) so i asked for my deposit back. a month later. still no check, i called the dealer like 3 times. first time he says it takes a week. ok. 2nd time he said oh he will check on it. 3rd time he said he cant believe i havent got it yet and he will check it the first thing tomorrow morning. and a week later.. still nothing. anyways. bottom line. can i dispute the charge on my amex since there was no transaction i.e. there was no deal. or do i need to go to the dealer and give him a good slapping?