Don't worry too much. It doesn't matter if there is no malice. It will only charge late fees and interest for these days. You can call customer service to explain the situation, remember to repay on time in the future, and always be careful not to be overdue.
The easiest way to save trouble is to automatically repay the debit card in Zhang Pingan. As long as there is money in the card, it will be automatically deducted when it expires, or through online banking transfer, counter repayment, self-service deposit and withdrawal machine repayment, etc.
Relax, you will be familiar with the related business after using it too much.
good luck