If you notice an unauthorised charge on your credit card, act quickly. First, contact your bank’s customer support and report the issue, providing details like the transaction date, amount, and merchant. You may need to fill out a dispute form or submit a claim online. Make sure to keep any supporting evidence like receipts or communication with the merchant. Your bank will then investigate the dispute, often removing the disputed amount temporarily. They typically resolve disputes within 45 to 60 days. Stay in touch with your bank throughout the process to ensure the issue is addressed promptly and the charge is reversed if it’s found to be fraudulent.