(NEED TIER 3 SUPPORT) My phone line does not show up on the xfinity app

My phone line does not show up on the xfinity app. I have spoken with at least 10 Xfinity mobile agents through a call and this issue is not resolved. I believe my phone number is stuck on an old address / account which is why I cannot see it in the app. If an agent can help me so it would show up it would be appreciated. The agents I have spoken with on the phone receives an error when trying to transfer my number over.