[Resolved]  Tata Motors — concorde motors patparganj sales team

I booked tigor car from concorde motors patparganj delhi.
They cheated me as they are not delivering the car on promised date.
Secondly,
Now when i wants to cancel my booking,
They are not refunding my booking amount
They are saying that do whatever you want to do we will not return your full amount.
They are deducting 20000 rs which is against rule.
I wants to talk with there head.
How can they do this