1. Did you apply for their credit card, because it may be the phone number of credit card customer service.

2. It's almost Spring Festival now, and banks have started to hold many customer feedback activities. Are you a potential customer of the bank and invited to participate in such activities?

3. During the Spring Festival, there will be some upgrades for idle customers, and there will be some new businesses or new products for telephone sales.

Finally, make sure whether you have gone to the counter to do business recently, whether you have forgotten to take the receipt or left anything behind.

If none of the above is true, then let him go and call again if something happens:)

Good luck ~