Other Offenses: Sent a $2000 Check to a Contractor for Materials

My question involves criminal law for the state of: Florida I sent a $2400 check to a contractor for materials. Now he is stalling the job and can not provide evidence that he purchased said material nor will he agree to hand over the material. I mailed the check from ga. It was a company check and he cashed it in Florida. What do I need to do to proceed with demand, agency to file reports etc

Other Offenses: Sent a $2000 Check to a Contractor for Materials