Error when trying to add a line

Hi,

I have been trying to add a line to my account for the last 15 days with no luck! I can check the compatibility of my device, and when clicking continue I get a "something went wrong" page, apparently, because I didn't select any plans, but it never showed up. If I try to purchase another device, the error is the same.

My attempts went through the chat, more than 10 times spending some hours there, visiting the store, and a 2 hours call yesterday with supposedly the Tier 2 agents that didn't fix anything.

Has anyone had the same error before? Any suggestion to solve it?

It seems like I am more interested in being a customer after 2 years than Xfinity trying to solve the problem and keep me, so I am trying the last shot and if there is nothing I can do by myself I will port out my lines, this may solve the problem for good. All I want is to keep my internet discount...

Thanks!!