S. M. Cars — hefty bill 78000 without any visibility

Address:	560068
Website:	www.justdial.com/Bangalore/S-M-Cars-24-7-Opp-to-Audi-Showroom-Hosur-Road/080PXX80-XX80-130128145124-

This is to hereby state that i had given by car for service with s. M. Cars which is in hosur road there was a noise in engine and service was carried out on an estimation of 15000 as shared by owner. Now without my consent he states that he has replaced close to 40 parts as per the hand written bill with an hefty amount dumped on me of rs 78000. And vehicle was not at all released forcing me to pay the bill. As a customer i donot have any visibility of parts been replaced also i m not been given a invoice bill instead a hand written bill. Im being cheated in all the ways possible. I, m not been given any reference whether truly original parts have been replaced, also whether really parts have been replaced.
Im been given a hand written bill with a paper as the wish dumping on me hefty amount. He has told gst charges and all relevant taxes included for this amount but i have no reference. Same way all the customers are cheated in this garage.