One month from query, no solution or feedback

According to my data contract bill, I was charged for sms's sent to an international number. I query this and told its my fault and responsibility. Told to pay for itemised billing which I then do. <br> <br> I eventually identify the number and query this with Vodacom. I get told a query is logged with the billing department and I will be given feedback in 48-72 hours. <br> <br> Days pass no response. I email for feedback. I get told that for ***** reasons, provide bank details. <br> <br> Days pass after sending details, no response. Again email Vodacom and their response is, billing department still busy, we will let you know. <br> <br> Days pass again no response. Again email Vodacom and told for ***** reasons, provide account/tariff plan details. Details sent, Vodacom reponse: your case is currently closed because we can't contact you via cell phone. <br> <br> So for the past 31 days I have been charged for itemised billing and international sms's and no one has been able to stop the sms's or tell me whats going on? 6 eService people later, each failing to read the previous email thread and still not getting any further, if anything, I took a step backward after a month. How can I escalate this to someone competent?