Maruti Suzuki — No delivery of Maruti ertiga vxi cng limited edition

Address:

Mumbai City, Maharashtra

Hi,
Please guide me where do I complain about the delivery of Maruti ertiga vxi cng limited edition which I have booked through ur authorised dealer ( spectra motors ghatkopar ).
I have booked on 23.07.2014 .
I was promised the delivery will be in one week but still today there is no fixed date about the delivery .
Please guide me where do I complaint about this .
Rajiv m zatakia
[protected].