VMC Developers — na plots allocation

Address:

Thane, Maharashtra, 400601

Hi team,
We have purchased na plots from vmc vihang city shahpur. After we cancelled our plots and gone for settlement. At that time they said they will start the payments monthly from sept2017. But still we have not received any thing from them. We called them to the given contact number but they are not lifting that phone.
Can you please suggest me how to proceed o n this.

Regards,
Venkat.