Consumer Redressal

I had booked a flat with GM Infinite Builders in Electronic City, Bangalore on 1st December 2014. I had paid a booking amount of Rs. 1 lakh towards the same. On booking, builder did not provide me the land title deed, Encumberance certificate, property tax paid receipt for last 10 years and other documents regarding the property. I was going to pay 20% amount through my Company PF loan, and due to the builder not providing these mandatory documents my PF loan got rejected. At this point I had requested for a complete refund of the booking amount. Builder then said they will provide the required documents and home loan sanction letter. After more than a month they kept on dilly dallying on both providing the documents and the home loan sanction letter (they had some legal issues). I cancelled the booking at this point and asked for the booking amount refund, which every builder is bound to give back after deducting some percentage, but GM completely denied to give back any refund.Help.