Without access to your old email address, the only option is to call customer service to change it for you Guide: How to find help & contact O2
Hey @Fife have you been able to change your email address or do you still need some help?
→ 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?