Shocking customer service

I put in a cancellation request online about a month ago (as they don't let you do it in store and they don't pick up). I received cancellation confirmations via email and text. I called today 14-September-2018 to double/triple confirm that cancellation was going through. Miraculously I got through to an agent and got confirmation of the cancellation. However when I queried my bill, she then got frustrated and upset that she couldn't explain the bill to me. (this is without me raising my voice at all) I asked her to get someone to explain the bill to me and she basically left the phone off the hook on me and now (i'm typing as i'm on the phone), the phone is silent. No wonder Telkom is where it's at. The level of people and lack of customer service or focus is shocking.