Hi @BinaryLife , sorry to hear about this! You can see more info here on what to do if you suspect any fraudulent activity on your account. Have you contacted customer service about this so they can go through the fraud process with you? It might end up not being fraud, but it's best to check this with CS as soon as possible.
→ 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? See if the My O2 how-to guide will help
If you'd like to take part, why not register? 
