Supertech — refund of registration fee in project basera

Address: Gautam Buddh Nagar, Uttar Pradesh

We have booked an apartment in supertech's basera project and applied for its cancellation. We submitted all required documents in time and supertech's received them on 25th may 2016. We flat 504 in tower 6. After multiple follow ups about the refund, we were disheartened by the way, a big company like supertech treated us. After two years we are still waiting for the amount. Is it not complete fraud on their part to just keep our hard earned money for so long? How can i get my money back from them?