Consumer Redressal

I had purchased the above flat in 2010 from EVEREST DEVELOPERS ( Vimal Builders) and they had said that they will allott me car parking later. On demand from their officer Mr Arving Sharma, I had also sent a cheque of Rs 82250, towards car parking. I was then informed by them that car parking lot number 12 has been allotted for me but stickers will be given after sometime. They said they can not give me receipt or any other letter as it is not allowed by their management. I had but sent them mail on their official mail id mentioning that they have confirmed that they have received my cheque and has allotted parking number 12 to me. But now these people are not giving me parking space and it has become difficult for me to park my car when I go there and also in putting the flat on rent without parking space. Sir, how can a builder after taking hefty amount for the flat not provide parking space. Please help.