Unitech Limited — Delay in handing over Apartment in Kolkata

Address:

Kolkata, West Bengal

Hi, Unitech has been promising for the last 2 years that they will give us our apartment in Harmony, Rajarhat, Kolkata. I understand from them now that it will take more than 5 years to give us the apartment that also is not guaranteed. I have paid 95% of the cost of the apartment. What should i do to get Unitech to act? Is legal course the only way left? Thanks A