Is there a refund for the legal reminder service of Jiufu local law firm?

This is legal. As long as there are legal debts, no matter who you call for debt collection, it is legal to collect debts on behalf of creditors. Within the statutory limitation of action, if there is evidence to prove it, you can bring a lawsuit to the people's court where the defendant is registered, and apply for enforcement after the court makes a judgment. The statutory limitation of action is 3 years. If the lender fails to provide the loan according to the agreed date and amount, thus causing losses to the borrower, it shall compensate for the losses. If the borrower fails to collect the loan according to the agreed date and amount, it shall pay interest according to the agreed date and amount.