@ChadSWLAGlass Sorry for the trouble you are having with your Premium Family plan.
You will first need to create separate accounts for each of your children using the email address you sent their invitations to.
Once those accounts are created, have them sign into their accounts on their respective devices.
They can then accept their invitations using the link that was emailed to them.
In the meantime, I have also created a ticket with our support team for you.
They will be contacting you privately via email to help look into this further, so please keep an eye out for their message.
Thanks for your patience!
