Ez Plumbing

So, you call EZ Plumber thinking they sound reputable, but you get some other plumber. Why do plumbing companies do this? Yes, they fixed the problem, but $625 for 1 hr! Are we paying for the plumber and a referral fee as well? If the City can send a crew and clean the line for $340 then $625 seems excessive. If you call one plumbing company and get another you should be told they use subcontractors.