Best Trash Compactor Repair in Saint Louis MO

The Chesterfield Service technician opened the drain too quickly when draining an old hot water heater and flooded the first floor unit below mine.  The flood resulted in $1,400 of damage, of which I had to pay the $1,000 deductible.  Chesterfield Service refuses to accept any responsibility, even though 2 other plumbing companies have said not testing the drain was irresponsible.  They have not responded to my BBB complaint.  I think they are not accepting responsibility for a simple mistake and leaving me with the $1,000 bill.  I am very disappointed.