My guess is that you have used up the internet allowance on your current membership, the current membership does not expire until a later date, you bought a new membership and this new membership has stacked to kick in when your current one has run its full monthly course and expires. Buying a new membership in such circumstances doesn't give you the new membership allowances until the current membership has expired and the new one starts. When you use up membership allowances before the membership has run its full monthly course then you need to buy add-ons to tide you over until the end of the current membership.
http://www.48months.ie/membership-plans/add-ons
Your online account should clarify if this is the case - check the current membership status and expiry date, next membership and start date, current memberrship allowance balances and the My History page for recent payments and purchases:
http://www.48months.ie/my-48/my-history
When you buy a new membership (even if it does not start immediately) then your credit balance is charged for it immediately:
Where has my credit gone?
Hope this helps.
