CWI Maintenance Down South Contracting They do not pay! Deland Florida

My Company has completed 2 separate jobs for CWI Maintenance.  One was on 6/5/2015 and the other on 5/1/2015.  I have sent them over signoffs from the manager of the store where the work was completed and many pictures.  Now almost 4 months later and I still have not been paid for the jobs.  I have tried contacting them for the past month straight with only one response which said that the one job was never approved to do the work.  After I submitted to them the letter that said that the work was approved they said that they were giving the information to the owner.  The that was the last time I heard from them.  No return to my emails and no calls back. 

I would stay away from doing any work for this company.  They do not pay their contracters!