Apple Watch activation issue with app

Novice II

When i go to set up cellular, i login and then it says my watch has been added to my account and to hit continue. Instead of loading the activation page, it closes out and goes back to the set up cellular page.
It’s been over a week and customer service has been awful and no help.  I’ve reset my watch, restarted all devices, and deleted and reinstalled the visible app 100 times. Everything is up to date. 
I keep getting emails saying they tweaked something on their end and all is good but this is not true. 
I’m five  seconds from switching carriers. Someone please help because their customer service is no help at all. I’ve wasted so many hours on this and they even messed up my service and my phone didn’t work for a few days. I’m so frustrated.