Maruti Suzuki India — servicing charge

Address:

600016

I own a maruti swift car and it is 5 years old car. I got my car servicing done at vishnu car service private limited last month. After my servicing, i was charged exorbitantly for annual periodic servicing albeit it involved routine service as previous years. I also inquired for annual service charges with breakup for any routine service without any additional defects from maruti suzuki through mail.
However, maruti suzuki directed me to the concerned car service centre and concerned service centre is not responding even after repeated calls and mail. Also maruti co. Is yet to give breakup or details of approx amount to be charged for any periodic annual servicing of diesel car