Welcome to the club razor4077. Would suggest you get in touch with the local HM representative. They have one in every city. Write a mail to:
customersupport@hindustan-motors.com
Don't expect a prompt reply, they take a week to reply. Mention that you want the local reps number. Call him and give him an earful. have him come inspect your car and give the instructions to the HM service guys.
Also, one thing you have to remember is never to pay a single paise till your happy. They charge ridiculously for tightening or changing door hinges or replacing bumper clips that it aint funny.