Vehicle Loan 3wheeler Ape Diesel — Mediater cheating,high interest collecting

I buy ape diesel passenger auto with sriram finance loan.every month emi is 8050.in lockdown time 3emi is pending.i paid pending emi RS 24150 after 8 months.the mediator wants rs5/- interest for pending emis as total telling 18000/- .I am asking interest rate details but he can't telling.please help me to get actual details.