Your post is unclear.
What exactly did you try to buy - cash credit topup, membership(s?), add-ons?
What does your account say about your current membership status and expiry date, allowance balances, cash credit balance, and does it list any "next" membership and start date?
https://www.48months.ie/my-48
What does your My History page say about recent payments/purchases/topups:
http://www.48months.ie/my-48/my-history
Hope this helps.
