Banky team Reviewed editorial answerIf you see the same transaction deducted twice, first check the status of the two lines: one might be "Pending" and the other "Final Transaction," which doesn't necessarily mean a true double charge.
Steps
If both transactions were indeed made and reduced your balance twice, contact your bank and file a "Duplicate Transaction" complaint, specifying the date, amount, and merchant's name, and obtain a reference number.
Keep your purchase receipt or merchant message if available, and don't request another charge from the merchant to test your card.