I hired what I thought was a licensed and insured roofer to redo my roof come to find out he is neither and h?

..find out he is not licensed or insured and he began to strip parts of my roof and install economy no warranty shingles.A contract was written but I never signed it because he said I didn't have to....the shingles were supposed to be 30 year shingles...when I confronted him about it he told me don't worry he has me covered and that's how he keeps his prices low.These shingles are discolored and I mentioned that to him right away before I had any knowledge about the shingle ...he had all of the packages turned away from the house so that I would not see the ECONOMY NO WARRANTY labels on the packaging...he has not been around since I confronted him and all of his tools are tered all over my yard and front porch and there is even some on my roof not to mention the dumpster that's been sitting in my yard for almost 2 weeks now...HELP...what do I do and what about all the stuff including about 20 packages of shingles sitting in my driveway that I do not want because they are not warranted...I paid him half up front...and now my roof is a disaster with roof boards exposed.I live in Machussetts.