Hang up the phone immediately, contact bank customer service, etc. Credit card telephone cancellation usually has to be done by myself, because banks need to verify the identity information of the cancellation person to ensure the authenticity and legality of the operation. If someone claims to be a cardholder, try to cancel by phone, and the cancellation operation may not be completed because the identity cannot be verified. If the credit card call is cancelled by someone other than me, I should hang up immediately to avoid further losses or risks. You can call the bank's credit card center, explain the situation to the customer service and ask for a new cancellation operation. If the bank requests to verify the identity information, it can provide relevant certificates or documents to complete the cancellation.