Also they are all native. perhaps not white but they are native. I have no idea which instructor you were referring to. I can say all teachers there are nice, friendly, caring, and helpful. I know all teachers, principle, and even supporting team so well.
please go to anfield's website, all the teachers they hired are native-English speakers with degree in education. if u have hesitation, why not spend time and speak to the teachers? u can make yr judgement by then.