Tata Motors — Unavailability of requested colored vehicle

I booked Tata Tiago Xz Petrol XZ (Striker Blue ) on 18th oct2016 and still dodnt get delivery. Sir, I raised the complaint on customer on 18th december 2016 and later on also no responses from tata motors. Company said that waiting period is reduced to 3 weeks but sir i already complited 75 to 80 days for booikng still i didnt have delivery of the vehicle.