Hinduja Leyland Finance — Over charge

Address: Delhi

My name Sandeep. My vehicle loan already paid in 2018.but I got a sms rupees 500 over due. I went nearest branch and enquired about my loan closing.but hiduja loan agent asked me 1970 due you pay then account closed I paid 1970 via paytm then agent asked after 7 days loan closed. My question you to rupees2470 why charging me .
This totally cheating me. Please help me in this case.
My loan account number-DHDLDETW08451