Mobile contract buyout page not working??

Just switched to Xfinity on 1/12/25 and have been trying to use the buyout promotion to get $500 per phone. I'm using the site: https://mobiletimetoswitch.xfinity.com/#/purchaseinfo and every time I click the "continue"  button at the bottom to submit my old bill from Verizon it just redirects me back to the same page? Tried calling and speaking with a rep for over an hour. Then tried going into the store and they salesman there pretty much told me good luck. Anyone else having this problem?