If you can't make calls then it sounds like you have been disconnected @AllanC
If you are pay monthly, are all your bills up to date?
If you are pay as you go do you have a current bundle/credit on your sim?
If both of those check out, try rebooting your phone to make sure it is registered on the network.
You could also try your sim in another phone, or another sim in your phone - that will show if the problem is with your sim or phone.
See also the below guides:
Guide: How can I sort out my network issues?
Guide: Is the network down for me or everyone?
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 Do not publish personal details (email, phone number, bank account).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
