i'm guesing his favorite coin was de-listed...something easily mined. i haven't seen- any - issue you have ignored or haven't tried to address as best you could yet, even still you can't make everyone happy even when they get exactly what they asked for. they may still ask for more, and complain more. some don't even understand what their own issues are, quite often.

I do hate it when a coin is de-listed obscurely, when many exchanges still trade it, and it continues being added to others. But it sure does hurt the user when their favorite most trusted platform, just seems to do what they want with our coins...some may not give enough time to swap or withdraw...and the coin is "lost"