If you bind the bank card and take the initiative to deduct the repayment, you can call customer service. If the facts exist, the money will be returned. In the future, try not to repay on the day of system deduction, especially a few hours before system deduction, because at this time, if you take the initiative to repay, the probability of repeated deduction will be higher. As for whether the bank is at fault, I personally think so, but you can't let the bank admit it. The bank will only give you one sentence to help you find and solve the problem, and the rest will not reply you too much. As you know, the bank is a very overbearing enterprise. For example, if the bank gives you money, it will tell you that you are not responsible for going out in person, whether it is fake money or poor money. But if the bank gives you more money and you don't pay it back when the bank calls, the bank can sue you for illegal possession!