rude staff

On th 15.05.2015 i recieved a call from 1 of th staff frm th foschini financial group regarding my dads account which i handle and pay. My problem is not with th reason for her call . Its her tone and attitude basically shouting at me for th account not being paid. Arrangements have been made for th account for 3months. However her tone was not acceptable by me as a client. I did tell her to speak properly the next time and to apologise to which she just shouted and questioned and refused to apologise. Totally unacceptable behavior. She eventually just cut me off.