Hyundai Motor India — Verna not delivered for more than a month

Address:

New Delhi, Delhi, 110034

I gave an accidental verna car in deep hyundai workshop, mundka delhi,. I gave on 6/9/16 and it is not delivered yet. Today is 10/10/16.
They gave me estimate of of around 96400. And now thy say it is 170000 around. Almost double.
Since last 10 days, i m daily calling them and chekking d status, but i don't receive a single call from thr side,, which is the duty to complete the car n give details.
Ravi, the manager over thr, is showing very irresponsible behaviour, n from last 10 days his words are"aapki gaadi kal de dunga". His "kal" will never come.
Please take some strict action asap.