Consumer Redressal

I had purchased shop in April 2010 at Kamothe from M/s Royale enterprises. Builder gave key and temporary possession letter. Later we find that the authority took the electricity meter away as builder did not fill the electricity bill. Even though shutter was unable to open. Builder shut down his office. We tried to contact him at his office address as well on phone. In phone he promised us every time after oc all prob. will be solved and oc will come in next month. Last month Jan-2013 oc was received by the blder. He is asking Rs.20000 for giving oc copy and possession letter and residents of the building are asking Rs.26000 as maintenance charge. They were staying there without OC. I did not use shop at all. I spent Rs.10000 on shutter repair. I did not get electricity meter just because of oc and possession letter. Kindly guide me what shall I do further.