Rajasthan Housing Board — lease money related and allotment related

Address:

10/117 FF Aravali Vihar Bhaiwadi Alwar Rajsthan, 301019

Dear sir,
Myself dharmendra singh i purchase a property in r. H. B aravali vihar bhiwadi in dec-2016 e. W. S scheme higher purchase. When flat aloted to me lease money is only rs.42842/. I have no idea for deposited lease money but today i go to r. H. B. Bhiwadi office they demond me rs 75000/ (42842*18%gst+ lease money pending interest). Just like double in 2.5 years it's more amount for a middle cost person please help and suggested me direct resistration process if flat aloted in third party how can we transfer in our name.