Unsuccesful Upgrade to iPhone 15 Pro Max

Dear Xfinity Representative,

Via Xfinity Mobile Chat, I asked the agent several times if I could upgrade my iPhone 13 Pro Max to an iPhone 15 Pro Max and keep my current phone number. The chat agent answered yes each time (I have the transcripts). The agent stated that a new line was necessary even though this was an upgrade. I stated that I was not interested in a new line but needed to keep my current mobile number. Also, I was eligible for the $830.00 credit for my iPhone 13 Pro Max and another family member's.

When I received the iPhone 15 Pro Max, a different chat agent was unable to transfer my current mobile number to the new iPhone 15 Pro Max with the new line. He asked "Tier 2" for assistance and they were unable to transfer my current mobile number to the new iPhone 15 Pro Max. I was frustrated and asked for a call back from a US-based Supervisor and "Akadia" called me back. She transferred me to the Mobile Cure Dept in the Philippines and they were also unable to transfer my current mobile number to the new iPhone 15 Pro Max.

In my frustration over such a waste of time (8 hours), I have decided to return the new iPhone 15 Pro Max.

Can someone please assist me? I still want a new iPhone 15 Pro Max using my current number and am willing to trade-in my iPhone 13 Pro Max for the $830 credit.