Mahindra Finance — Illegal selling of my vehicle

I had a loan on my school vehicle UP62BT4582. We had missed the payment of Corona Period due to school closure, which we were paying little by little with monthly payments. Two days after paying ₹50000, while our vehicle was going for fitness checkup it was sized (7/5/2022) by some goons illegally without any valid documents. We were also not informed about any such action prior. Now it hasn't been two months also. When we contacted the loan agent to know about details to close the loan account, he said that the vehicle had been sold already(on 10/06/2022). But as I said before there was no communication from company about selling of my vehicle also. They took our 2 vehicles but we got back 1 after paying the amount they said. Now we are in an urgent need of our vehicle. So, please take an action as soon as possible.