Can I complain that the loan will be reduced as soon as I repay the loan?
You can complain that the credit card will be charged as soon as it is repaid, but you can consult the bank first to understand the reason for the charge deduction before complaining. If the credit card is reduced due to non-cardholder reasons such as system evaluation, the cardholder can complain to the bank. Complaints about investment channels can be made through the bank's official customer service hotline or the bank's official website. In essence, it is a breach of contract for banks to unilaterally reduce the credit line.
Of course, if the credit card is reduced because of the cardholder's overdue repayment, even if the cardholder complains, it will have no effect. The cardholder's overdue repayment is itself a breach of contract, and the bank's reduction and exemption after the cardholder's repayment is also a measure to avoid risks.
It should be noted that after complaining about the behavior of reducing the amount after credit card repayment, it is sometimes impossible to restore the amount. Of course, the cardholder can use the credit card according to the requirements of the bank after consultation with the bank. Generally, if the credit card is used normally and a good repayment record is maintained, the bank will take it back.