Mahindra And Mahindra — about service in anant cars, mysore road

We have bought 3 mahindra company vehicles 1 scorpio and 2 xylo. There was some problem in wiring, light used to blink always. We gave it to service, they said it costs 35000, so we told them to claim insurance but they kept the vehicle for 7days in mysore road branch, then they said to take it to bannerghatta road. So we took it there and they said engine ec problem and it will take 15 days. They are not even responding properly, we have bought 3 vehicles and this is what service they are giving for us, so please see to that problem why they need 15 days to make that repair. We are ready to give 35000 and take insurance after that but they are not listening they kept our vehicle for 7 days and did nothing, so please see to that mistakes and inform that branch to give better service and attend the customers properly.