A divorce agreeemt or settlement is like any other contract or agreement; it is legally enforceable. You may look to bring a legal action yourself--not advised--or you could retain counsel to represent you. If it turns out that the former spouse is deliberately (e.g. not negligently) ignoring the agteement and otherwise acting in a sufficiently reprehensible way, it may be possible to collect attorneys fees from him, too. If you cannot afford an attorney, try contacting some of the organizations that offer support and advocacy for women generally or divorced women in particular: one of them may be able to provide or at least point you to some low cost, or even free, legal resources that could help you. Good luck.