Sale deed lost but informed after taking bayaana money

I entered into a agreement to sale for a property .. The dealer showed us the photocopies of the property and assured us we will be given originals and assistance for any purpose like bank loan etc.. We have the earnest money through Cheques.. Then I went to bank for the purpose of home loan for arranging the balance consideration amount.. The bank officials ask me if I have map in the original sale deed .. they advised me to kindly see it as it was not clear from the photocopies .. I went to the seller and asked it from it various times but he kept on delaying it .. After few days the propert dealer informed me that the seller’s original sale deed was lost many years back and gave me the NCR of the lost document then at his office .. i felt cheated and asked my money back from the Seller .. He said ok But not gave my money back .. I filed a legal notice as well but of no use .. I complain it in PS as well but they are not listening and said there is no offense as such .. kindly advise