Unitech Limited — not handing over my flat in uniworld city, kolkata. vista tower 1, flat 904

I had booked a 2bhk flat in uniworld city kolkata, project name vista tower 1, flat no 904. My customer id uv 0349. I had booked the flat in march 2010 and possession was within 3 years. Still it is delayed by 3 years and not giving me possession. Since 2010 i have invested more than rs. 34 lacs. What will be bank interest of this money. Where is the return of my money. It is almost difficult to talk to any higher level person in unitech office. Whoever executives are available in front office does not communicate properly, even does not give reply of mails are being written to them. 2 months ago they had handed over a notice to me when i had visited unitech's kolkata office at newtown, kolkata on enquiery about possession of my flat. Matter of the notice is flat will be made ready after payment of the following charges. After going through the charges i found charges are countless. Some of the charges found unjustified and on query did not receive any proper explanation from unitech staff about those unjustified charges. This charges are not as per the agreement. I cleared all charges as per agreement and as per payment schedule. I stay abroad and could not appear physically. I am salaried person and invested lot of hardened money since long time. Need early solution.