The 619 error is very common on Vodacom, i usually get it about 3 times EVERY time i try to connect to Vodacom . I also use an MTN sim, exact same settings, much less issues.
So don't assume it doesn't work if you get 619 errors. 619 is the equivalent of a "network busy" signal in 90% of the cases i've experienced, doesn't mean your settings are wrong [although you also get it if your APN is wrong, but MTN and Voda uses same APN].
I also see you're in Centurion, i am too, trust me it's 619-hell here. I literally "spam connect" until it connects ...just keep going eventually you will get through.
I was on MTN 2GB last month, Vodacom 2GB this month. Results so far:
MTN = very stable, connects easily , consistant speed [but not necissarily fast]
Vodacom = unstable, mission to connect [619 errors], if the connection sticks, then if FLIES ..extremely fast speeds and so on.
So it's a win some loose some situation.
In summary : If you can connect to MTN with your card, then you should be able to connect to Vodacom with the EXACT same settings. The only operator that you need some manual tweaking is Virgin.