Hero Electric — Hero Electric Optima E2 motor replacing

I am buying an hero optima E2 electric scooter.

Afterr 6 months the motor of the vehicle got struck on running. The dealer suggest to replace the motor and order it.But even after 2 months nothing is happend.when contact the dealer, they replied that the motor not get from the company and suggest to wait.
Therefore I hope an early proceedings about this mater from the company or take return the vehicle and encash.Otherwise i am forced to take legal remeddies.