Once the sim arrives @Alan1951, call o2 and let them know. They will then credit the days between when you have been billed and the sim arriving.
Alternatively contact them on social media (again once the sim arrives) and they can do the same thing.
(Twitter | Instagram | Facebook)
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 Do not publish personal details (email, phone number, bank account).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
