I managed to get online for about 15 mins yesterday and suddenly the line got cut off. I tried to connect back it doesnt work.
Maybe your credit is done? R10 won't get you very far (5mb)....
Hmm.. is Vodacom or MTN 's 3G signal better in Stellenbosch?
I had a MTN 3G card in Stellenbosch when I was there and we found that their signal is in general better than Vodacom's, so I think you are on the right track...
Lastly: try and visit Java Cafe in Church Street (look for "Kerk Straat" in Stellenbosch, not sure whether the sign is in English)... they have good broadband wifi access at a decent price.