[6d0debc071]

I'd do:

1) Tell them you're not comfortable enough with your relationship to do any more work until you see the money you're owed. Might also be worth pointing out they'll still owe you for work done and that they'll incur additional expenses searching for someone else to pick up the project.

2) Start looking for other work, this isn't making you any non-theoretical money at the moment.

3) If 1 doesn't work lawyer up or walk away, depending on whether you can afford a lawyer.

4) Never work with them again.