Tata Motors — Dealer cama motors in ahmedabad

Address:

Ahmedabad, Gujarat, 380007

I had a booked a tata tiago dz with tata motors dealer cama motors (Khanpur, ahmedabad). They have taken the full amount 10 days back and now they say that there is a problem with the rto's temporary registration so can vehicle without registration. If we want the registration then we have to wait.
1. While taking the money cheques on may 23, 2017, nothing of this was mentioned
2. I have to call everytime to know of the status. They never call on the day they say the issue will be resolved. They have credited the entire amount to their account within 2 days and earning interest on our money. Today is june 5 and no news from them!