You might want to contact a lawyer anyway to be sure that your jurisdiction has no recourse in your situation..such as detrimental reliance. Only a local lawyer can tell you that.
However, unless the property was bought a long time ago, it is likely not have any equity, anyway, so there would be nothing there to split. How much is it worth now? More or less than the purchase price?
Don't let yourself be fooled by promises again! Good luck.