You stop trying to save the whole programme and start fighting to protect the part that cannot be rebuilt. A budget cut in the middle of a transformation is not a financial event. It is a political one. The money is rarely gone entirely. It has been redirected, which means someone made a decision about what matters more than your programme. Your job is not to argue against that decision, at least not immediately. Your job is to understand who made it, why they made it, and what it would take...