Do you mean that you bought landline add-ons?
What does your online account say about landline mins balance and/or your landline add-on balances?
https://www.48months.ie/my-48
What does your My History say about recent purchases/payments/topups?
http://www.48months.ie/my-48/my-history
What sort of number are you trying to call?
Remember that some landlines (e.g. international calls, 1850/1890 etc.) are not covered by membership or add-on landline allowances and are charged from your cash credit balance.
http://www.48months.ie/membership-plans/other-call-charges
http://www.48months.ie/membership-plans/international-calls
Hope this helps.
