I purchased plot with cash of rs 2.8 lacs in 2010 in Nagpur. Builder had offered me a scheme under which he asked me not to register land and after 3 and half years he will pay me the double amount. I have an agreement of Sale and Power of Attorney as a documents under my name. The possession of property is with builder. Now he has declined to pay me the promised amount and asking me to register the property by paying Rs 50000/- Please suggest me the legal course of action.