Sorry to hear you are struggling @JazZee , but as this is a customer community we can only offer advice.
Try turning your phone off and on again to see if it is a temporary issue.
If that doesn't work, can you try your sim in another phone and/or another sim in your phone? This would show where the problem is.
The customer advisor you spoke to might have ordered you a new sim - if so, your old one would have stopped working.
You can either wait til the new one is delivered by Royal Mail, visit your local o2 store (with photo ID) or try getting back in touch with customer services - how to do this is in the guide below.
Guide: How to find help & contact O2
Guide: A Guide to Skype
Please note, this is not customer services and we cannot access your account. Do not publish personal details (email, phone number, bank account).
Link to our guide on how to contact them can be found here
