I think the most you can hope for is your travel insurance to take you home and possibly back to the point where you had to abandon your trip (depending on the policy wording). I'm not aware of any provision in the xONEx rules that will allow sector refunds.

Since you have plenty of time left on your DONE4, why not just go back and start where you left off - this could be in (for example) 9 mths time?