You can't make this change right now. We need to verify your contact information.....

When I log in to my Xfinity account online, it asks me to add a personal email to secure my account.  When I try to add another email address, it says "You can't make this change right now.  We need to verify you contact information to keep your account secure.  Make sure to add your phone number and email address if you haven't already." and it has a link to "Go to contact information."  My cel phone # is there but the "personal email" is blank, so try to add it and I get the same message above.  --- If I try to make any changes to anything, it says the same thing, with a link to "Go to contact information" but I can't find ay way to add or verify my contact information.  What do I do?