This depends on whether there was a voucher for the bank to redeem the fund at that time. If there is a redemption confirmation form issued by the bank, both parties confirm that it is correct and sign it, then the redemption failure is caused by the bank's unilateral operation error and can be resolved through consultation with the bank. If you feel dissatisfied, you can appeal to the legal department and ask the bank to compensate for the losses caused by its fault.

The reason for the redemption failure is 1. If the remaining share is insufficient, it needs to be redeemed in full. 2. The transaction password is wrong. 3. UnionPay system or website transaction failure.