My company is doing a large commercial job. There have been many delays, putting my crew months behind. The general contractor is telling me to work it out with the other subcontractors. He is also trying very hard to get us to do things not in our contract, big and little things. I don't mind helping out some, but it is getting ridiculous. I've told him that I will do some of these things, if it is on a change order and we get paid. He yells alot and tells us to do it or we will get back charged for putting the job so far behind. We have written a letter that we emailed, faxed and hand delivered stating all the things that need to get done so we can move forward on our things. He doesn't acknowledge it. Is there a process where I can backcharge the general contractor for uncontracted work and for the excess time needed to keep labor and equipment on site? Any suggestions would help. Thanks.