But they employed you to teach "oral English, advance[ed]Business English. MA and PhD students!" And recently you stated that you worked at the best schools and universities.

I would like to talk about the buildings and campuses when I say, "best schools and universities" in the above sentences. It's simple that I could give the same treatment to the opposite way round as they did to me if I had been in their position. But I don't want to and will not do it in any way.