Child account creation - Family sharing error
I've been trying for two days to make a child account on iCloud. I have myself and four others, room for one more. It allows me to add the name and birthday, then I need to do a verification for consent and add my credit card details. Every time I do I get an error and it says "try again later, your request cannot be completed". I have tried 2 different credit cards, including the one i have on file for my subscriptions.
I called apple support yesterday and was told to keep trying every 15minutes when the servers reset because there is no locks on my account, and everything looks like it should be fine.
I have tried to make it on:
The new iPhone I need it for, my personal iPhone and my iMac.
Has anyone gone through this, and have a solution? I'm trying to set up a birthday present and while I'm glad I got it early, I don't want this to be a last minute thing.
Thank in advance
iPhone SE (Gen 2)