For a fact, I know that others have gotten and continue to receive good service from this individual.

Actually the "fact" as I see it is you are NOT receiveing good service from this individual and if the "facts" you stated above are accurate you should have No problem in revealing his name.
Why would this create a "hissing contest" if the "non-service" you are receiving is accurately described. Is there something here you are NOT disclosing that's relevant to this situation?
Jim

The 2nd Amendment IS an unalienable right.