Reliable builder wanted [revised]

Back in March we contracted with a local builder: Marcus McGarry, who does business as EcoExpress. He did part of the work, and we paid half the agreed amount. He then asked if he could have the remainder of the money up front, because the rest of the work would require expensive materials. I had some misgivings, but I gave him the benefit of the doubt. Bad mistake. All progress stopped, and no amount of chasing him by phone or berating him in person seemed to be able to get him to actually do the work he had been paid to do.