Go to My Account/Devices.
How many do you see? Are they all real (Roku devices have a habit of spuriously occupying two or even three slots per device)?
Can you delete any, so you can start using the ones you want, or have you got to wait until July?
I don’t know what the Parental PIN would have to do with this, though.
Contact the ‘real’ Live Chat.
A thread called Live Chat (a title that NowTV should prevent anyone using, if you ask me) is not Live Chat.