upset in mississauga

I had my roof done by Continental Roofing and soon found out what a scam artist the owner Micheal or Mitch as he is called. He orders more bundles that are needed ( my house there were 12 extra bundles) and he takes them with him after the job is done so that he can return them for a refund. Those were mine I paid for them! When i gave him the cheque, certified i might add he started with "oh didn't the salesman tell you to right the cheque to my name" so what about the taxes that were in the bill? The extra bundles I should have been credited for? He is the biggest con artist around (still operating in the greater GTA). AVOID THIS COMPANY AT ALL COST OR YOU WILL BE SORRY!!!!