Exploitation of the worst kind by the real estate agency.

Q: The Builder indicated in his brochure that the 2BHK Flat will be given possession by 31st Dec.10 and so far not given as construction was at snail's pace. He has mentioned in the agreement that Rs.5/- will be given for the delay, if any, per month. After paying Rs.28 lakhs we have stopped further payments as the construction was very slow. Now, the builder is unwilling to pay even the paltry compensation mentioned above and intends to charge 18% for the balance amount due to be paid. (i) For his inordinate delay, whether we can demand higher compensation? (ii) Whether National Consumers' Commission or Supreme Court has given any Ruling on such errant Builders? (ii) How far it is justified that he is withholding payment of compensation and on the other hand invoking the clause of 18% blaming the owners as defaulters? Whether National Commission for Consumer Grievances or Apex Court has given any judgement in this regard to tame/discipline the Real Estate Companies?