Bajaj Auto — Noc

I used to have a bajaj auto loan whos number is L2WHOW05094852 I was paying it off really well buy after lockdown my business got shut down and i was going through a financial crisis so the emi were not paid in time so i opt for settlement of the whole amount i paid the amount in cash n got a receipt in my whatsapp from the collection agent n kits been 6 months i'm still struggling to get my NOC. Initially the collection agent was co-operating and he event mentioned that the loan is not yet closed and it will take couple of days more and i started getting sms from the company that some amount is still due from my end.Presently he is not answering my calls or messages the company office is also not able to tell me anything about the loan .