Loan — Mishandling in loan process

Hello,
I am guaranteer for Car Loan. Against
Loan no: 6219355
This car is resaled to another person by Mahindra Finance pimpri branch.
Now branch is denying and saying this car owner is not changed.

As per standard procedure, after loan transfer, gauranteeer, owner names should get changed.

I had visited Pimpri branch and asked justification for the same.
There is no response & old owner, guaranteer are getting overdue notices.

Currently my CBIL score is negatively impacted.

This is not authentic process.
I have decided to file police complaint against uneven loan transfer procedure handled by Mahindra finance.

I have received call from pimpri branch clarifying that loan no. 6219355 is not transfered and there is no role of mahindra finance.

For your information,
I have affidavit copy saying that car is transfered to new person.
I am not satisfied with the justification.
It is against reputation of mahindra name.
Everyone will be cleared after legal complaint. But how can team resale or assist to sale vehicle without clearing documentation?
It s legal fraud.