winmar Winmar Rips off another contracter guelph, Ontario

I have done work for Winmar for the past 4 years and have worked myself to the "go to contractor" all the  project mangers called, me because had no call backs from the work completed by my company. I put in my invoices as usual
but started to get concerned when my invoices reached 18,000 dollars I put a hold on work for Winmar and now have been jumping through hoops to try to collect my money. I have hired a lawyer to collect my money and had them send a
demand letter and Winmar they did not respond.

I called and talked to Winmars controller and she said they were holding all my money because of one disputed invoice,
a job I had done in Kitchener for a home owner that was unhappy with my work, I found out the complain was some dust on the drop of there buffet and flower arrangement hanging in the wall above eye level .My guy must have missed it
when he was cleaning. Now I have a back charge from Winmar for 4,989.00 and are going to deduct that from by invoices ,one that is cleaning of the house for 40 hours. And an other for scratching the motorcycle . What motorcycle I never saw
one. Roseanne The controller said I won't get any of my 19,000 till I  sign a paper stating I will agree to the back
charged invoice and not go after any more money they owe me. (blackmail) I dont think this is right the invoices were from 2010 and now mid February and still no money.

So many years of hard work and this is what I get. I would like to worn any contractors at this time to stay away from this company. Now I have asked for the details for the back charges over a week ago and have not received a response.