Not A Happy customer

My two furnaces were replaced two years ago and I paid up front. This spring I had mold in my wall next to where the furnace exhaust leaves the house and warm and cold air meet. When I had a contractor come in to check there was no insulation between the wall and the outside wall. Furnace Family people didnt bother to put insulation there so when hot and cold met water leaked and mold formed. Greg came out to look and he said he would call me back but that was in May. I havent heard from him and when my furnace was serviced I asked and I was told he no longer works there. This is what happened to the guys who installed my furnace poorly . They also no longer work there. Coincidence?