What does your My 48 page say about your current membership status, expiry date and allowance balances?
https://www.48months.ie/my-48
As 1amcn says you need an active membership and membership or add-on allowances to be able to call/text.
Even services that are charged from your cash credit balance (e.g. international calls/texts, MMS, certain landline calls etc.) will only work if you have an active membership.
48 is a bit different to other pay as you go services in that you generally need to have a monthly membership in place to use most services.
Hope this helps.
