You can complain. In fact, what you are applying for is a telecom contract package. These few hundred yuan are not given by you yourself, but the telecom business office has applied for a few hundred yuan for you based on your basic information. For a loan, they will transfer dozens of dollars to your loan account every month to repay the loan. If you do not abide by the contract during the contract period, they will not help you repay the loan. It is equivalent to paying for the rest of the router with your own money. But if the contract proceeds normally, there will be no loss for you. This is a common routine used by telecommunications business offices. If it is handled without knowing it, you can call 10000 to complain against them. You can also call 12315 consumer hotline to sue them for consumer fraud. You can also find a lawyer to sue them for financial fraud. The prerequisite is It's you who really don't know.