What is the exact error message?
It's hardly "already buy"?
What does your My48 account dashboard say about your current membership plan status and expiry date?
What exactly is/isn't working for you?
Connection to the 48 network - i.e. signal bars?
Incoming/outgoing calls?
Incoming/outgoing texts?
Mobile data?
When was everything working ok for you last?
If you need to contact 48 support about this then see the links in my signature below.
