Hi @Alastair18
Welcome to the Community.
It sounds like you have a subscription directly through Netflix but being paid for through your EE bill, (as opposed to being through an EE inclusive subscription).
To check this just log into your Netflix account subscription page to check what it says- it will either show the level of subscription you have with Netflix, or it will say "Netflix through EE".
You can have a look at Netflix on EE TV for details on how to set up your EE TV Netflix subscription.
Ali
