Hyundai Motor India — I am complaining about service of dpm hyundai dehradun

I received a call from dpm hyundai dehradun haridwar bypass for service of my car.. From campny one drive came to pick my car from my house and after that when i went to see my car in workshop the service done by them was not good and they have made the bill of 24000 and last service was of 18000 every this the service price has been going up and they also add some items in bill which was not done in service they use to cheat us which is not gud and i have also complained tw the service manager but i don’t get any response from them after they the told me that car will b derliver you at your house by 7:30 and when the drive came to deliver my car the front glass whindshild was broken now they are say it was from befor i told them to check there camera of workshop but they are not listening... I request you to help me out