Rude agent

I called to require about my data usage and the agent had the cheek to raise her voice at me when I instructed her not to shout at me she justifies that she raised her voice Coz I could not understand what she was saying when I tell her I do not appreciate her shouting she hangs up on me and sends me to another clueless agent!!!! Maybe it's time to start looking at what other service providers have to offer!