1. Contact the merchant
Your best option is to reach out to the merchant directly to request a refund for the duplicate charge. This is often the fastest way to get a resolution.
2. Submit a chargeback dispute
If the merchant is not responsive, refuses to cancel the transaction or you suspect fraudulent behaviour, you can submit a chargeback dispute Ensure you provide all relevant evidence.
If you encounter any discrepancies, document all communication with the merchant and retain receipts or other evidence to support your chargeback request. You may refer to this FAQ for more information on how to submit a chargeback dispute.
You may also refer to this FAQ here to find helpful information on common duplicate charges, such as Petrol in Malaysia.