@WRep
Word at the stable door is that you should always Factory Reset any device you plan to dispose of.
Any device, even though Now devices are of two types, those where the logon times out, like phone and tablets, and those where it persists, like Sticks, Boxes, TVs, and games consoles.
As you have found, if Now on a persistent device is kept logged on, then a password change does not affect this.
We used to be able to blow such devices out of Now, but this capability was lost when device limits were abolished, and it has never been restored. I do not know where due process at Now broke down over this, but broken down it has 😢
However do not let Live Chat tell you it can’t be done; you may have used the wrong terminology for what you need them to do, but they should have realised this. Anyway, @gavs82008 has now kindly given you the correct terminology, so go back to Live Chat and encourage them to do the needful!
Set a Payment PIN on your account so that no-one but you can buy memberships on it.
Check your bank accounts monthly for any other unexpected payments to Now.
That way you can at least nip them in the bud, while you and Now figure out whose fault they are.
