Hyundai - Service work

Hello i have verna car i buying car **** from Arora Hyundai Jaipur and i do every work related to car i do in work in Arora work shop but now i give them my car for change oil chamber they put new oil chamber and they doing service change oil air filter all paid service then i get my car back after **/** days after that im drive my car altlas **/** km then my car automatically off then car not start i call road side assistance they come and tell me in your car selaf issue your car going to work shop they change your car salaf after that i send my car arora Hyundai then *days i go there and see my car they don’t check my car after ** days i call and go work shop then they tell me my car Engine sees i don’t no how to possible this and they give me estimate amount *.**,*** they play games with me i don’t want like this service please take a action for Arora Hyundai how is possible in under **,*** km engine sees let me know please