Shocked at how I was treated by the call centre employee.

I just called the call centre and oh my word I am in shock. I spoke to someone, their name starts with an N and she didn't want to repeat her name after I asked her name again. She couldn't even let me get a word in! I called with my airtime to follow up on the sms I was supposed to receive which I never received. I am in shock I can't even type properly. I asked to speak to a manager and she said she doesn't have a manager. I thought the service was bad before but oh my goodness what I received now, it's beyond words. Like wow! Shocking! I need someone to call me ASAP there is just no way, absolutely no way that's how you guys treat customers. She was shouting at me, giving me attitude, not allowing me to speak and to top it off she told me I can drop the phone if I want to. I can't even begin to express my shock right now! I need a contact number, I need this sorted because when I call the call centre for assistance I'm not calling to be shouted at by someone that's supposedly trying to help me.