Worst Customer Experince in delerships

I have booked the car around 3rd September, when the Delivery Comitment was 4 to 5 weeks, it is 16th October today still the vehicle is in transit and not sure when they will Deliver it, shows the failure in delivery system.

I had Put a complaint mail on TATA ZEST mail ID still None from Tata Motors has contacted me to understand the kind of problem I am facing.

On daily basis Customer only has to Folllow up with delership to know the status of the Car. for which they had a typical answer that Car is alloted by TATA Motors, the 

Even though Tata has Created a Masterpiece Like Tata Zest with Low Pricing and Good Looks it is the Delers and some of the Regional or terretory managers worst response time and commitments giving worst experince to Customers.

Till the Tata motor not work on that they will achieve their old Glories.