Understand the reason why the account is frozen. If it is a settlement account, it needs to be deducted from your transaction funds because the bill is transferred to the bill collection agency, then you can unblock it by paying all the money. If the account is frozen because the acquiring institution determines that you have risky behaviors such as cashing out, you can lodge a complaint with the acquiring institution and provide the corresponding transaction documents, shipping records, invoices and other materials signed by customers according to the requirements of the acquiring institution. If the complaint is successful, it can be unsealed. If the complaint is unsuccessful, it may be necessary to pay a certain fine and take part in risk theory training before unsealing.