Maruti Suzuki India — Dewars garage - maruti dealer is making unsolicited calls to purchase vehicles

Address:

Kolkata, West Bengal, 700039

I have received at least 14 calls from dewars garage - soliciting the purchase of a new car although i have purchased a car - registration number wb06l 4241 from dewars garage on january 2015. The calls are received since then.
So i have raised a complaint in end february with maruti - head office and that complaint is still not resolved.
Today again i have received a call from dewars garage - the 15th call from the number[protected] soliciting the purchase of a new car. I am planning to file a case against dewars garage and maruti as a whole for mental harassment.