Return Label Not Printing

I am attempting to print a shipping label for the return of my devices, as I live out of state and cannot return them physically to an Xfinity store. Every time I try to print, this message shows up: Your equipment details are unavailable at this time. Please check back later to see if you're eligible for a device update. 

I do not understand what this could possibly mean and have spent a lot of time trying to return these devices. How should I solve this issue? Is it possible for a shipping label to get sent to me in person or emailed to me? I would like to resolve this as soon as possible so I do not continue to get charged for still having the equipment.