builder not giving plot possession not refunding money not contactable

In the event Builder is avoiding communication with you, giving wrong statements, and not giving you possession, and in alternate not refunding your money, file a police compliant against the real estate company and its directors, and get an FIR Lodged.

For this we need to look at the documents as to what was the stipulated time promised by the builder to hand over the possession. Nevertheless in case the period promised by the builder to hand over the possession had already expired then you can file a suit for specific performance of the contract as well as suit for damages for the financial losses incurred by you due to non-delivery of the possession.
You can also file a complaint in the consumer forum against the builder for deficiency in services and claim compensation from the builder.