Job estimates through the roof

I will never ever have a Mr. Rooter job done again.When they arrive they give you a written estimate to sign before they start, and when you compare prices later Mr. Rooter is more than tripple other contractors.My friend also a senior had a repair estimate of $1,200 from Mr. Rooter and had it done by another company for $250.00.I complained to head office in Waco, Texas and they told me nothing could be done.