Superior Field Services Did not pay after over $2000 worth of work, we paid out in advance Pheonix Arizona

We answered a craigslist add, to manage bank owned properties. We have a couple years experiance with doing so, normally, they send you a job, you do the work, send them the pictures, and on to the next job. They responded to us, sent us the contracts and there guidelines and we faxed them back. On the contract it says, we pay 30 days after the work has been done. So we do all this work for them for about 3 weeks, then they sent us a huge job to replaster a pool, we said we could not pay for that up front it is way to much money, so they cancelled. then we never heard from them again. 30 days came by and we did not recieve a payment, so I called, they told me they would get back to me, didnt call me back, Called again, no answer, finally emailed them. they said they were experianceing delays in there payment and thay they should have our first one out soon.. Couple more weeks went by and couldnt get a responce to them, finally they responded last tuesday saying they sent out our first payment, only 230 out of 2200. They said 3 days max and it should be in our accounts. Well Its been 10 days, still no payment, they also will not answer there phone, or email. We have worked for many companies in this line of work, and they always pay, usually alittle early. Everything we did we paid for ourself out of personal money. Now we want it back! Don't do work for them they will not pay you.