Tata Motors — not got proper service

I have bought one tata ace from trupti motors, cuttack, odisha. my driver took the vehicle to tangi for 1st servicing. for that i booked oned day prior also. but inspite of my driver told the mechanic that a unusual sound coming from the engine, the service center people did not do anything. they also did not washed the vehicle and told that the person suffering from fever.
the service center is around 20 kilometers away from my house. as you know i just burnt around 3 liters of diesel which costs around Rs.225/-.driver fooding Rs.100/-. But the condition of vehicle is as before. i could have changed the oil and filters in any garage on payment basis, as was done in your service center. if this is the case with tata motors, whom we will blame? if repeated will go to consumer forum for redressal.