Increase limit without notification

I am disappointed at how Rain handled my query ***. No one could tell me how my limit was increased from R250 to R500. I logged a dispute in week one of December 2019 and never received any feedback. I had to call them for follow up, spoke to couple of managers and still there is no resolution. Today I called again and I was told that they resolved it that I changed the limit. How and when was it changed they did not provide feedback. I was placed on hold for too long. Is this your way of making money by charging customers for what they did not request for? I need this invoice to be reviewed again, I will be mad and limit myself by not have access to wifi for nothing. I want to pay for November and continue with my services. AND I WANT THIS SORTED OUT IMMEDIATELY, your customer service sucks big time