We called Terminix when a cat died next to our house thus creating maggots and flies in our basement when it fell through the window. We called asking if they could rid us of this infestation of flies; they had no problem and sent someone out to do an investigation.
They gave us the talk about what they would do and we accepted other termite offers etc.. A guy came out to rid the flies and told me his manager said not to get rid of the flies and that they don't do that service.
Thanks, we waited a week and now they have multiplied out of control. Never again.