you have signed the agency form which mentions that builder can charge 1 per cent of base price in case booking is cancelled
2) on cancellation of booking builder may refuse to refund your advance payment of Rs 1 lakh
3) if builder refuses issue builder legal notice to refund your money
4)builder cannot collect any money from prospective buyers during pre launch period
5) only if building plans are sanctioned , commencement certificate issued can builder sell flats to purchasers
6) contact a local lawyer