Most banks offer common methods for blocking your credit card. You can either
Contact customer service.Send an SMS messageUtilize internet banking.Utilize a mobile app In-person, go to the bank’s branch.
How to block credit debit card on a mobile app
Login to the App
Choose “Service Requests” from the drop-down menu.
Navigate to “Card Management.”
If you’re blocking a debit card, choose “Block & Replace Debit Card.”
If you’re blocking a credit card, choose “Report Lost/Stolen Credit Card.”
Enter “Reason for Blocking” and then select the card to be blocked.
Keep safe your bank accounts and all related documents. When you notice any problems, contact your bank first. Never give out bank documents to anyone.