What kind of handset do you have?
Did you get your Registration email...?
Did you get config messages...?
(For example)
iphones need to sync with itunes etc for some odd reason to be able to settle on the 48s network...
However, apart from the above-& reminding you to have data roaming active - if nothing i suggested help's... time to contact support.
http://help.48months.ie/requests/newLet us know how you get on...
🙂