Kaizen Nissan — Cleaning problem and servicing problem.. Charged completely but work not done properly

Okhla service department is the 3rd class service station, especially there neelu mam, i have called thrice for the complaint but no one bother me.. Charged highly for the service and i have paid them 26000 but the work not done properly, especially cleaning problem and aftr service my car is vibrating in the first gear, dnt know wat they have done