gatahgi contracting

I had contract for a new roof with gatahgi contracting and they did not put the roof vent on correctly. On november 2 2009 I called another contraactor and he verified our complaint.Northern windows and siding gave us a estimate of $500.00 dollars to do it correctly. Spoke with Ed turner everday from then to get someone out here to finished the job right and he keeps putting us off.This job is going on 2 months now.