Bank cards cannot be recharged. What's going on here?

When the bank card cannot be recharged, it is frozen, or it can be withdrawn but cannot be recharged. If the bank card is frozen, the cardholder can call the bank customer service hotline to let the customer service staff find out the reason. Banks are financial institutions established in accordance with the law to operate monetary credit business, and they are the products of the development of commodity monetary economy to a certain stage.