Prestige plumbing are a disaster (dishonest and not to be trusted)

Prestige Plumbing is a disaster. They left rust residue on my roof sheeting when draining the old geyser. They never cleaned the rust residue off the sheeting. I have my several attempts to ask them to fulfil their professional responsibility and return to clean the roof sheeting. They ignored me every time. They are dishonest and not to be trusted