The $99 super pack includes unlimited free domestic calls and SMS, and 15GB of data for a year. Unused data rolls over. International and ‘premium calls’ (eg calls where you are charged by the company - eg ‘900 services’ - require a prepaid cash amount.
If you have the super pack and you are being charged for domestic calls there is something wrong… you might best ring Aldimobile and have a chat.
https://www.aldimobile.com.au/products/super-pack
We can offer opinions and advice but the Aldimobile customer service team will be able to sort what is happening on your account.
edit: Aldimobile does not support any 900 premium numbers but ‘might’ support SMS to some. See 22.3 and 22.4 in their T&C document.
To ‘fund’ calls not n a super pack or other pack, a PAYG credit is necessary on the account.
But care has to be taken to assure if a PAYG is added, it does not prematurely cancel a ‘pack’. It is always best to ring the respective call centres and explain what one needs, what one has, and how to make it happen, especially without unintended consequences.
