Alpine Roofing

We hired alpine roofing to do our flat roof and replace the shingles on the back half of our house. The roof leaked this winter and there was severe damage to the dining room walls, ceiling and our hard wood floor. When I complained the fellow who came out to look at the roof said it was our problem. After contacting the 'president' of the company he said that something hadn't been done properly and he would come and fix it. After fixing the 'problem' he refused to give us any compensation for the damage to our walls and ceiling. Doesn't he have insurance to cover this kind of loss? I would never hire this company again.