Expat Properties — property not handed over

I've invested in two projects of expat properties and its full paid up. Till date there is no update even mail sent remains unanswered. There office in dubai has no person to reply to queries.in between there was visit by expat representatives from banglore office who had promised to revert back with the update within 4 weeks but it has been more than 5 months there is no revert inspite of several reminder mails.

Project name:
1) carnival
2) mystic hill's ii