iPad Setup for Child very buggy

When it comes to family setup and parental controls,

Once at this screen, the Continue stops working and it just doesn't continue to proceed to set up the child's account. On occasions when it does, I get stuck at an instruction that asks for a 6-digit code, while at the same time, says CVV of the credit card at the text field. The only outcome I get from entering the CVV or a 6-digit verification code on another device is an incorrect error message.

This is so frustrating... and how does this even pass your software development QC???

[Edited by Moderator]