Cactus in San Francisco

I purchased a washing machine from home depot. Mackie was the company who delivered it. Upon them installing it they cracked the lines causing a water leak in my basement and refused to take responsibility. The company stated the house is old as well as the lines. When it's not even 10 years old. They are refusing to compensate for the damages they have caused, which is clear to see it's there fault. They are inconsiderate unethical people. STAY as far away as you can from these people.