It would be worth doing two things - 1) run your finances through something like the 'turn 2 us' website that will give you some idea of what you might be able to claim 2)get individual advice from CAB or suchlike. It might be that there are things that would bring your household income up a bit, even if it does not make up totally for the loss of your ESA.
Nothing on this board constitutes legal advice - always consult a professional about specific problems
