Did you enter into a written agreement after having taken legal advice. If so then the agreement will stand and you could not open this up again unless you can establish that the minute of agreement was not fiar and reasonable at the time it was entered into. A written agreement would not,ally provide a clause whereby it was fair and reasonable so I think you might have to walk away from this. However, that is the general position. Always take confirmation from your own solicitor who knows the background here. I hope that clarifies the general position. Please leave a positive rating so that I am credited for my time.