Refused to assist me

I went in to email and make copies. A lady assisted me with the email then got onto the phone. She went to the back of the store and was on the phone for about 20 min. She eventually moved back to the counter and started doing something else while on the phone. So I got very angry for waiting 20min and asked very agitated if she can make me copies too. She told me that she is busy and blatantly refused to help me. That's my punishment for getting angry at her I guess. I will never set foot in sandton mall postnet ever again.