Decarie Plomberie & Chauffage

I needed to change most of the pipes in the house, because they were old and problematic. At first glance the job was assessed to be about 2,000 dollars worth. I agreed. After opening the walls the plumbers realized that there are less copper and more old steel pipes then they thought, so the estimation changed to 5,000 dollars. I was not happy, but it needed to be done. The final bill arrived asking for 8,000 bucks! I feel stupid and cheated. In addition, they opened the walls with hammers, resulting in huge irregularly shaped holes, which they did not fix, unless I pay for that too. I will never come back to Decarie Plomberie, that's for sure.