Terrible service and over-charging

I receive 300MB of data with my contract and an additional promotional 1GB per month. After using all of my data, I proceeded to buy an extra bundle. Once this bundle was depleted, I attempted to buy another bundle using the Vodacom App as usual, but it failed. I tried the website, it also failed, and then I tried the app again and it still failed. I eventually managed to access my potential bill online, which listed my promotional data as a charge. I phoned customer care and was informed that Vodacom was having billing issues. Throughout this time of not being able to purchase a data bundle, I am being charged out-of-bundle rates, through no fault of mine. I expect that when this is resolved, I should be charged in-bundle rates for the extra data that I have used. I phoned customer care earlier and after following the prompts and holding, my call was answered. However, instead of speaking to me, the consultant proceeded to have a personal conversation in the background. I expect that Vodacom will remedy this situation before my debit order comes off this month.