You need to pay all the debts before you can cancel this card. Moreover, the card of Bank of Communications is accounted for separately. That is to say, how many youth cards have you swiped, how much money should you pay back on the youth card, and how many Suning cards have you swiped, and the two cards should be returned separately.
You call the customer service of Bank of Communications to find out how much each card owes, and then call the customer service to cancel the card after paying it off.