During a power outage I went to a Marathon station in Mt. Prospect Il. I paid for a tank and filled up a 5 gallon container and had no problem I came back to refill the 5 gallon container and it said see cashier. I did not see cashier but tried it again and it said the same. I then used another credit card that it accepted and charged me the appropriate amount. I checked my credit card the next day and was charged $100 each time it said see cashier. You cant call Marathon since there is only one live person answering the phone. I feel sorry for him since Marathon should be answering for there HUGE errors! Thw T