Terrible upgrade experience + Lack of customer service

I have been a loyal Vodacom customer since cell phones became popular in South Africa. I currently have 7 contracts with you for the entire household and even extra handsets. On 4 May I contacted your upgrades contact center to migrate 2 numbers to a different package. For no apparent reason, the consultant proceeded to change a third number to a different package as well! What you need to know about this third number, is that for almost 2 years I have not paid any subscription charges on the line – it came as an extra on one of those double deals with 2 handsets, and I never even activated the SIM so it was never really a concern because it didn't cost anything. But all of a sudden there are now subscription charges on this line! I called back immediately on the 4th of May and asked that the upgrade - which I never requested! - be reversed on this line, which I believe has been done. Yet my invoice for May still show these charges, and the bill so far for June (online) still shows a subscription charge, as well as a charge for Legal Advice. I have called almost every day this week hoping someone can fix this, yet every time it only gets logged but nothing seemingly gets done. Who do I need to speak to or what needs to happen for this to be sorted out? I am not appreciating the poor level of service I am getting from Vodacom. To top it all off, the 2 numbers that I called to upgrade are being charged more than what was told to me by the consultant! I am seriously regretting signing up for another 2 years with you people.