You should be fine if you follow the above advice @Dami but if you need any further help then let us know.
→ COVID-19 support - Help and support from O2 during the lockdown
→ Access for You: Registration - Find out how to register for our Access for You service.
→ Just joined the community or thinking of registering? Check out this handy starter guide!
→ Have a query about your account? login to My O2 for help
If you'd like to take part, why not register?
Unless you have been given a change date, you need to chase it up with customer service.