I have been with Vodafone's very old monthly SIM-only "pay-as-you-use" plan for over 20 years. The good thing with it is, you don't pay if you don't use - perfect if you travel overseas for months. This month they have finally moved my plan to a new $10/month plan with the following inclusions:
- $10/mth plan fee, reduced to $5/mth for the first 12 months, whilst you stay connected to this plan
- 1GB included monthly data, then keep using data at slower speeds in Australia with no excess data charges
- Unlimited standard national calls and text in Australia
- Unlimited standard international text from Australia
- International calls are charged at our Pay As You Go rates
- $5 Roaming will automatically be activated. An additional $5 a day. Excludes data capped at slower speeds.
I think the deal is pretty good except the additional $5/day for the international roaming.
Have your old plan been terminated the same way by Vodafone? I don't seem to be able to find this $10/month SIM-only plan on Vodafone site.
Check to see if Vodafone sent you any emails with information about the situation.
I've had similar things happen to me via Optus and I've ended up on plans that weren't available to others OR were available for a period of time which just coincided with my forced change.