Regarding Property

Hello sir, I would like to seek suggestion on this issue. My father and his brother (let's assume my father as respondent 1 and his brother as respondent 2)had engaged into a joint venture of producing silk through a reeling unit firm. (Though the property was originally owned by my father he went into joint account registration of a site measuring 31*125). To build an infrastructure and to get working capital the took a loan from state government financial corporation of Karnataka .But couldn't able to run the business and after sometime it has been seized and it has been sold to a party illegally without intimating the owners by lending corporation. After negotiating to the party who took the property they came to compromise as the property was idle they could use it as a asset. But while transferring from party to respondents (original owners) respondent 2 has done fraudulent along with the advocate and they prepared a draft the whole property should go to respondent 1 and hence cheating respondent 1 by giving no authority and compensation in return. Also they urged sign instantaneously as soon as respondent 1 arrived at high Court of Karnataka and respondent 1 signed under coercion or pressure without being intimated what has been written on the draft and also he couldn't able disseminate the legal terms of the draft and also he was not allowed to read as well. Unfortunately, the judge also didn't ask the consent of respondent 1 and he has signed on draft. Respondent 2 registered the property on his name alone without taking the confirmed witness and signature of respondent 1. Also at local municipal offices respondent 2 has changed khata from joint account to individual one by bribing them as respondent 1 did not give his consent. Now respondent 2 is trying to sell the property. What would you suggest? Court need everything in document form but it doesn't need what compensation respondent 2 got in return if he is willing to sign? Please assist me in this regard so that I will remain ever thankful to you.