Please read my report and assist!

Dear Vodacom. <br> I have been a Vodacom Account Holder for many years and this issue has come to a breaking point in deciding to change to a different network. I upgraded to the Red VIP package a year ago because of my already high usage. Recently, my Vodacom bill has been unusually higher than normal. I do use promotional data bundles over and above what is given to me. <br> Data has been disappearing unusually fast from my account. I would get an SMS saying that I have 4.9GB remaining and then 3 hours later another SMS would come through saying I have 1.9GB remaining without using my phone on any high-data usage apps. This is unacceptable. <br> I also got charged+-R600 for out of bundle data usage where I have always had a bundle available. <br> I logged a complaint on August 12th, 2015. <br> I called today, September 07th to follow up (almost 30 days later) and the assistant stated that they are still investigating the complaint. <br> I called twice during this period as well without any feedback from Vodacom.<br> I have already paid and being a RED VIP customer this has become unacceptable and very worrying that I am a victim of incorrect billing. <br> Please rectify this ASAP. <br> Thanks.