The reasons why you can’t repay your bank card money via online loans are as follows.

1. Banking services automatically deduct fees. After the bank card balance disappears, you can go to the counter of the relevant outlet to check the bank card consumption details, which may be related to the bank's deduction business.

2. Loan business, if you have related loan business, similar to business that requires later repayment, if the loan is not paid back in time, it may be directly deducted from the bank card.

3. The balance was stolen. After all the above operations are checked, you need to be careful whether the bank card password has been leaked. Users should freeze the bank card as soon as possible to avoid further losses.