Hinduja Leyland Finance Ltd company - Hinduja leyland finance limited company not giving me noc and legal papers of the vehicle even after

I have bought a two wheeler on march **** for which I have taken an amount of ***** as loan from Hinduja Leyland Finance.My loan contract no.is ESKOHYTW*****. My contract period was of ** months tenure.I have paid all the outstanding balance by may **** and hence have request for foreclosure on May **,****.
The agent who was handling my case informed me to wait for **-** days for getting NOC of the vehicle.
From September onwards I have made contact many times with the HFL personnel for the purpose none of them solved my case, instead they harrassed me by transferring the case to one another repeatedly.
Now I am in great trouble as this Finance company has neither closed my contract till date nor they are giving me the NOC for the vehicle; instead they are claiming Rs.*** as outstanding and threatening me either to pay the amount or to surrender the vehicle to the company. Not only that but also they have debited installments during the lockdown period violating the government standing guidelines.
Three persons Viz. Mr Suman, Ms.Sutapa and Mr. Rabi was handling my case and whenever I called them up they were tricking everytime and finally denied to give me the update regarding loan closure.
So, Sir, this is my humble request please look into the fact and take necessary steps so that my problem get solved.