To file a dispute over a card transaction, contact your bank and specify the transaction details: date, amount, merchant name, and the reason for the dispute.
Steps
If the transaction is not yours, clearly state "unauthorized" and request immediate card protection.
If the issue is with a merchant, prepare the invoice, correspondence, and proof of cancellation or non-receipt.
Obtain a reference number and inquire about the required documents and deadlines for your specific type of dispute.