Consumer Redressal

I am looking forward to launch complaint and get relief from builder and broker in Gurgaon. I am working with central govt. health dept. I have booked a shop in upcoming commercial project. when approached to builder Tapsaya group 70 grandwalk project in sector 70 gurgaon, he referred to their channel partner Homeseek realtors, MGF Megacity mall MG road Gurgaon. After negotiation booking was done through the channel partner in Jan 2015. money was immediately deposited. 1st installment was also given as per schedule. however, while making further installments i realized that their is change in the deal and higher money is being asked. After this i had to chase the broker very frequently. in fact i was forced to come to Delhi from my official trip spending lot of money. but all efforts have gone wasted. I have recently written to builder to intervene and sought out the issue but builder put interest and send me recently received precancellation notice letter.