Xfinity pods error when connecting

I have two xfinity pods I’ve been using for years without issue. Recently I was sent a replacement modem and the pods were disconnected from my account. I am now having an issue connecting them to my account using the app. When attempting to add the “new equipment” an error message pops up suggesting to try again. I’ve sat through four trouble shooting chat sessions and been instructed to restart the modem, provide the MAC address for the modem, in plug the modem for 30 minutes, and provide the serial numbers for the two pods. Every time the online agent has insisted they would fix the problem and every time the issue persisted. The mistreat trouble shooting resulted in them sending a service technician out to address the issue. The service technician attempted to connect the pods but ran into a similar error when attempting to add them to my account. The service technician left unable to assist me with my issue and unable to offer any guidance or steps to take from this point. I’m not sure how to solve this problem from this point.