rude comment

i asked to speak to a manager after being told i would have to pay a penalty for my cancellation after i cancelled my contract because the consultant did not explain to me correctly or i misunderstood her. The manager said she did not like my tone and she is not a child, to me my tone of voice was fine because all i asked her was to listen to me , which i apologized if she took offence to my tone of voice. I feel completely let down after i was told that by the manager that she is not stupid just black, i was shocked & didnt know what to say after she asked should she repeat herself & i said yes to which she said the same thing again.<br> <br> is this how you deal with your customers? is it even acceptable to make such a remark to a customer? all i wanted was the confusion and mix up to be resolved