Here's the deal, the ruling over this wasn't about the charge itself. It was about the fact that people who were going to be materially disadvantaged by being moved onto the Roam Further (£6 per day flat charge) when they were on contracts that allowed them to roam and pay standard rates weren't told clearly enough in the messages they recieved that they had 30 days to leave. The people who were identified as being materially disadvantaged were the ones Vodafone could see reguarly roamed in what were to become roam free destinations and paid the standard charges.
So from your point, you went to South Africa. Got the messages saying how much it'd be and feel disadvantaged because you were charged. That's not a reason to leave. Did your package always have Roam Further on it (was it there when you signed up?). If not and it was added mid-contract then were you a regular roamer to South Africa and a payer of the standard rates?
Businesses make commerical decisions all the time. I see why some people feel sore at the Roam Further prices, especially if they're not using their phone much at all but anyone who was entitled to leave due to these changes were notified (and then notified again when OFCOM and Vodafone agreed that the original notifications weren't clear enough) and given 30 days from that notice in which to action.
Hope this makes some kind of sense.
Edit: Just re-read and just want to check that the issue here isn't the £5 to £6 price rise for Roam Further that you're wanting to cancel due to? If so, this wasn't what OFCOM were talking about. That particular rise is due to the fact the government have now added VAT to roaming charges outside of the EU. They were VAT free previously. That complaint needs to be sent to the chancellor rather than Vodafone 🙂
