Coimbatore SGA cars cheating service

Hi,
I own a skoda Rapid and couple of days before, an unidentified two wheeler hit the side of the car and bumper came out a little.
when I checked with local mechanic, he said that by replacing few bushes, it can be repaired.
Since, it was due for my general service also, I approached SGA cars, Coimbatore for service and also to repair the bumper.
They took 2 days to prepare an estimate and gave it to me; the estimate was around 20000 rupees which includes bumper replacement for the minor repair.
I was surprised and declined to do the replacement.
The service advisor negotiated with me as in words "Sir, you have insurance coverage and finally you have pay only 2000 Rs from my pocket and remaining will be covered by insurance"
I told him about what the local mechanic said and preferred to take the vehicle wihtout service.
He started threatening me as I need to pay 3000 Rs - 2000 rs for 2 days parking fees and 1000 Rs for estimate.
I shouted at him that this was not told me during when I left the vehicle.
He responded as you signed in the vehicle hand over slip which includes this fees also.
He added that, if I agree to do the replacement , he will waive off the parking fees.

I dont had any choice and got the bumper replaced.
It is an absolute misuse of insurance coverage. When I was about to take the car our after the bumper replacement, I heard he was using the same fraud to cheat another customer.

Insurance is to claim for valid ones, but these SGA car guys are using this to cheat others.
Beware of SGA cars