To make international calls you need an active membership plan and also cash credit on your account to pay the international call charges.
International calls are not covered by membership plan call allowances - only Irish mobile and landline calls (and calls to Northern Ireland landlines using the 048 rather than 00 44 prefix).
The international call charges are listed here:
If you have both of those on your account and calls to Algeria still don't work then please post back with details of what happens when you try.
If you need to contact 48 support about this then see the links in my signature below.
