Does invalidation mean that the card cannot be used?

There are many reasons why the card cannot be used. For example, the magnetic stripe or chip of the card is damaged, or there may be a problem with the merchant's equipment and the card cannot be swiped.

If it is not for these objective reasons, then call the customer service hotline and ask if the bank has frozen your credit card. Bank freezing usually has specific reasons. If you ask clearly the reason, the customer service will also give you a solution. .