Bajaj Pulsar 150cc — Got a call stating that the loan is not completed after 5 years

Address:

Coimbatore, Tamil Nadu

To the concerned,
I am R.Navaneetha Krishnan, I had purchased a Bajaj Pulsar 150 cc (TN 38 AC 1462) in July 2005 through Bajaj Auto Finance and completed all the EMI's in the end of 2006 or early 2007 (which I dont remember because I dont have those documents now).
Now after 5 years I have got a call from your representative that I have not paid the EMI and it is pending ( I got an advocate notice during the loan period unnecessarily inspite of my correct payment of dues). I dont understand why such an activity is done after 5 years, I had paid my last EMI and got the statement of payments even.

But now I have received a call that still about 4500 is pending, why was this not before?
The mistake from my side was that I did not push for NOC due to lack knowledge.
I hope that I may get a solution.
Thanks