Activating Roaming From Another Country?

Hey guys,

I've recently left the country and won't be going back for sometime, and I just realized I've forgotten to activate roaming on my Vodacom sim.

Sending a message to 123/31050 with MyVodacom's free SMSs doesn't work, so is there any other way I can activate my roaming without actually going back to South Africa to do so?

Thanks,
Oxy