When was it working ok last?
Did anything change in the meantime?
E.g. phone software update, settings changes, factory reset, new handset, returned from roaming abroad, etc.?
Are there any error messages on the phone?
Are there any messages when you log into your My48 account?
Do you have a connection to the 48 network?
If not then if you do a manual search for networks can you see and connect to 48?
If you do have a connection to the 48 network then does anything work?
Incoming/outgoing calls/texts, mobile data?
If you don't want your membership plan to renew automatically then switch off membership plan auto-renewal - at least until you get this issue sorted:
Maybe you should try a replacement SIM?
If you need to contact 48 support about this then see the links in my signature below.
