Income Tax Department — avoiding income tax

Address:

Rangareddy, Andhra Pradesh, 500097

I purchased a house from builder for ₹ 52 00, 000 and initially we paid RS.12, 00, 000 we wrote agreement also.but at the time registration he demanded extra 100000 . We paid also because we already paid ₹200000 registration amount and challan also. D Chandra Rao from whom we purchased a house he had bar in bubai and he avoids all taxes (for this I don't have proof but all are saying). Chandra Reddy & Srinivasa Reddy both are doing lot of hawalla businesses.After collecting ₹100000 also he never paid any tax.we are suffering a lot because he still not completed the house. After two months also.
PAN .AJUPK1260B MR SRINIVASA REDDY
PAN NO.AHMPD1583E MR.CHANDRA REDDY. Mr Srinivasa Reddy is doing all the black transaction. He demanding the customers to give all amount in cash/self cheques only.and house registration value also showing very less
Fy 2018-19 he sold total 7 independent /apartments but he doing all transaction. In black. Sir if possible please provide us some justice and save our country from such a waste person. Don't think it is small
Thank u
Bhavani