Hyundai Motor India — handover my car without my approval

Address:

395009

I tejaskumar rajendraprasad fudnawala and i am an owner of hyundai i20 sportz version and its registration no is gj5 – cn – 4937.
On[protected] my car is stooped due to overheating at palej cross road, bharuch, gujarat so i contacted nearest service centre m/s navjeevan motors plaza national highway no 8, opposite swaminarayan temple, zadeshwar cross road, zadeshwar road, bharuch – 392011 for service purpose and he arrange for toeing my car to navjeevan motors plaza national highway no 8, opposite swaminarayan temple, zadeshwar cross road, zadeshwar road, bharuch – 392011 for support on same day i handover my car to mr. Krupal service executive for further process.

After 4 days mr. Krupal gave me rs 62000 (Approximately) estimate of repairing cost so i decided to sell my car in same condition and purchase a new car so i requested to mr. Krupal and mr. Nitesh to help me to sell my car.
On[protected] one used car trader from surat visited the service station for value purpose but
On[protected] navjeevan motors plaza service staff had handover my car to mr. Mahesh (Third party – unknown person) without my telephonic or written permission even they has not intimate me.
So my first question is who has given right to navjeevan motors staff to hand over my car to third person (Mr. Mahesh)?
My second question is why they had not even asked me to handover my car to the third person?
After 5 days fight with unknown circumstances on 1-7-2018 i got my car in scrap condition. So who will responsible for that?
It was just an overheating issue and mr. Krupal told me it was just head issue but they open entire engine, ac other parts.
I need an explanation why my car handover to third person (Mr. Mahesh) without my approval? And who is responsible for the damages or part theft?

Navjeevan motors plaza service staff cheated me by white-collar ways. I look forward to settling this matter amicably. If, however, the matter is not satisfactorily resolved by 5 working days, i will consider taking further action to resolve the complaint either through the hyundai motors india ltd or through the courts. I will also file a police complaint against navjeevan motors & navjeevan motors plaza service staff for illegally sell or illegally destroying my car.

Waiting for your reply.