Consumer Redressal

Dear sir/madam, I had purchased a property ( 3 BHK) apartment in kharghar navi Mumbai in Feb 2010. It was mentioned in the agreement that I will be given possession of the flat in dec 2011. I have paid my full money and about to get possession letter from builder in couple of days . And now builder has verbally said that I cannot sell my property for next 1 year since builder has still lots of flat remaining to sell. And I can only sell the property once builder sells all his remaining flats. This is no where mentioned in the original agreement . And builder has verbally informed me that they will put this clause in final possession letter. The possession of the flat is already delayed my more than 2 years and with this new clause of builder iam stuck up . I have been paying EMI for this flat around 90,000/- per month , now I donot have good job left to pay this EMI, please help me.