E-File rejected - Mailed my Return - Still charged my credit card

My efile was rejected, so I printed my return and mailed a money order for the amount due, but my credit card was still charged for the amount I owed the IRS on my return.   TurboTax specifically said that my card would not be charged unless my efile was accepted.   So now I have a money order (that I can't cancel) on the way to the IRS, plus a credit card charge for the same amount.   How do I get my money back?