I was in a business partnership with a so-called friend for 20 odd years. During that period we bought a house through the business. Just under 12 months ago, I decided to retire and get the pension. The house was still in both names under finance. My business partner said he will work out what I get. I signed my share of the house over to him. He worked out what I should get for the house and business. I thought it was a bit under what I should have gotten, but I said to myself, "no, he's a fair man," So I took it. Now I realise he pulled the wool over my eyes. Is it to late for me to react? What do I do? Have I got any grounds under Australian law?