If the borrower signs or fingerprints, the borrower is the debtor. Or there is evidence that the loan funds are actually used in part or in whole by the borrower, the borrower shall bear the obligation to repay. If the repayment is not made on time, the bank can enforce it through the court. Recover from it after repayment.
To sue the agent of the loan company in court, the other party needs to show you the evidence of the loan. I suggest you go to the law firm for face-to-face consultation. When you bring a lawsuit to the court, the other party needs to show you the evidence of the loan.