Arun Dev Builders — arundev, not refund our money

Address:

New Delhi, Delhi, 110035

We booked plot arundev builder's dehradun project in may/2007.
But company not start the project in dheradun then we cancelled the plot at 01/08/2014.
Company give us time again & again but company not given payment till date apl, 2018.
No body meet in there office.
What we do. Any suggestions
My registration no.27376
Our amount approx 1 lac.
If company not given payment early, then
I will take legal action early.