Unknown costs on account

Telkom I've been trying to log a complaint for the last month but I'm being taken from pillar to post or left hanging on the line. I need to know why I'm billed for things I didn't request, why is my spending limit decreasing almost weekly when I haven't used it and why do I have night surfer but it doesn't work?

I've called and the agents were not able to give me explanations, only that I should wait for the new Invoice to be generated next month. I need answers please!!!