Poor service for real

I upgraded my contract, mobile and data, my 1st billing was on the 20th of March, the Sim card with the date was open now I sit with a bill I can not afford, where I told them to make it a top up. Today calling them, I was send from the one number to the other, not one could assist me. I only want to change the open to a top up. I really find their call centre's not user friendly at all. When you dial 10213, they tell you dial 081180 then the send you back, telling you about an app. I came to a point I just burst out with tears. 😭 So disappointed in their service. Wow