Consumer Redressal

Dear Sir, We (me & my wife) have booked one apartment in MVL Project in Dec 2006 and paid Rs.________ as booking amount. After two year we have been told that the project got scrapped and they have offered us to shift to their another Project called MVL Coral where we have been allotted a 3BHK apartment admeasuring 1565 Sq Ft and also an agreement was signed in January 2009. Since then we have been making all our payment in time and as per the demand raised by the builder. Now after making almost 75% payments in april 2013 we received a letter from MVL that the area of our apartment have been revised from 1565 to 1800 sq ft as they have sold these apartments with this size only and after one month we are again told that the area has been further revised to 1925 Sq ft. Since then we are asking them to justify this increase in the size of the apartment but they have not either called us nor gave any reply in writing. Now they have issued a final notice to cancel our allotment.Pls help