Consumer Redressal

Sir I had booked 2 nos.1.5 BHK flats in a project by Eiffel-XRBIA near Hinjewadi. Pd.Rs.1 lakh against 2 flats booking amounts each Rs.50K on the condition that the 2 flats would be internally combined and the plan would be shared with us.No acknowledgement of payment recd. against 2 cheques.no acknowledgement by email about confirmation of the flat/building nos. from the builder sales office. After 2 months rigorous follow up the plan was sent in AUTOCAD which was not readable.requested for pdf but no response.after another 1 month we recd. a threatening email that if we dont pay balance amount out of 20pc booking amt the flat(only 1 flat mentioned)booking would be treated as cancelled.we changed our mind and decided not to go for the same. On sending cancellation email asking for full refund there was no response.again on making a call we were told that only Rs.50 K would be refunded as per their policy. We did not agree to any policy.nothing was told to us.Pl help.