i hope things are heading in the right direction for you now. you should never be expected to change in an office or a hall way that is unacceptable.
when you write a letter of complaint be specific ie about where you had to change, specific members of staff and their behaviour, attitude whatever you found to be unacceptable, it will mean that the problems can be dealt with precisely rather then as a blanket for the whole department as I'm sure there were people there you had no meeting with or no problem with
a constructive letter of complaint is far more useful
hope you feel better soon