Can not get resolution to a billing issue

Last month, my mother-in-law went admitted to hospital for a terminal illness. It was chaos juggling business and family commitments. Inadvertently left my wireless hotspot running on my phone after sending a client an email and without me realizing it My computer stayed connected and processed a 3 gig update. The next day I checked my usage to load more data, as a saw an SMS about my bundle and saw a report of a R3300 bill for data. I called Cell C immediately, changing my account to prepaid, reduced the credit line, etc. so that this couldn't happen again and asked to speak to someone about the bill. I've been waiting ever since.<br> <br> I've jumped through every hoop, but when it comes to speaking to someone about the account, there doesn't seem to be anyone with this authority. I get told I will be contacted, but no one calls. My husband and I aren't sure who set our limit so high so that such a charge could be incurred in the first place. We are really hoping to speak with someone who might allow us to pay for this usage as an in-bundle rate as the charge occurred moments after my previous package ran out. In my 7 years with Cell C, this is the first time this has happened.