Bill So Far

My account has a R200 bill so far added to it but I haven't bought any extra bundles nor have I surfed at out of bundle rates.i ran out of data 2 weeks ago but before even considering buying more data R200 was added to my account bill with no explanation.no answer from telkom as to why or where it came from either.apparently I must just blindly pay more money because you feel like it and not because I have actually received any goods for said payment.customer service never answers or responds and call center lady says she can't see the bill I'm referring to and that it might be a technical error but we'll find out on the first of next month.so even she doesn't know what's going on in reference to the strange bill.i want an answer.my account is not able to surf at out of bundle rates until I have authorized it to and i didn't.neither did I purchase a bundle after my data ran out so why am I being billed an extra R200 telkom?someone please solve this mystery.