I take it you have followed the instructions in the help article?
If still stuck, click on the green Chat online button near the top of the page here to speak to an agent.
You don't need a payment PIN set up to start new memberships.
And nor does anybody else with access to your persistent devices 😢
But which PIN are we talking about here, payment or parental?
Precisely. You said Payment Pin, but @sally1991 didn’t.
You are probably right, but I thought it worth checking,