Enhanced penalty as invested in commercial property but cause delay

I invested Rs.28/- lakh in a newly launched office space project in NOIDA, Uttar Pradesh. The project was to be completed in 2015 but they now say it will take another 2 years, may be more. As per agreement they will give me a paltry amount of penalty for delay @ Rs.9000/- per month at the time of registration. My question is - can I get a relief from the court by way of enhanced rate of penalty/interest @ 12% per annum from the agreed date of possession in view of extra-ordinary delay that was not envisaged during agreement Hindu