Best Sewage Cleanup in Baltimore MD

Let's start with stating that service cost $300+ per hour. my call to request service made it clear I was not sure if it was an electrical or mechanical problem with my garbage disposal. Disposal was replaced, then (plumbing) technician checked power switch which was dead. The disposal had needlessly been replaced. I replaced the power switch rather than paying another $300 for an electrician. No response to letter of complaint. How many other people have the same issue?  At least I had bought the disposal in case it needed replacing and didn't pay their cost for that. No more Michael's and Son.