Hyundai Motor India — Car not delivered since after six months

Hello,

I have booked Creta CRDI SX O last November with VB SRS Hyundai, Villupuram and the car is yet to be delivered. Initially the dealer promised to deliver the car by Feb and on every delivery date he keep moving the dates citing due to high demand. However he took the full payment from ICICI on Feb and we are paying EMI from March.
Now for last one & half month he is saying the RTO in Tamil Nadu are not accepting the registration of this model as the G V W of Car has been changed and Hyundai has not got the clearance from the government. We are clueless and not able to understand what’s the exact issue. Could you able give me a solution and help getting delivery of my car.