Executive Customer Relations Escalation – Undelivered Mobile Device Returned / Line Incorrectly Activated

I am requesting escalation to Executive Customer Relations regarding an unresolved Xfinity Mobile device, activation, and billing issue.
On September 10, I purchased a phone through my local Xfinity store in Olympia, WA. I specifically told the representative that I was leaving town September 14 and was assured the phone would arrive before I left. It shipped September 11 via UPS Second Day Air with signature required, but UPS did not attempt delivery until September 15, after I had already left town.
Because I was unavailable to sign and UPS could not arrange delivery when I would be available the following week, I had the package returned to sender. I never took possession of, opened, or used the phone.
Despite this, Xfinity assigned a telephone number and activated the line on September 15—the same day UPS unsuccessfully attempted delivery.
UPS subsequently returned the device to Xfinity. Tracking confirms Xfinity received it at its Mount Juliet, TN return location on September 21. I have the complete UPS tracking history and proof of delivery back to Xfinity.
The mobile line remains on my account, and I have not received the appropriate credit/refund for the device.
I have made repeated attempts to resolve this through Xfinity Mobile customer service. I have specifically requested a supervisor but have been unable to get past frontline customer service.
I am requesting assistance from Executive Customer Relations/Executive Resolutions to:
• Cancel the incorrectly activated mobile line retroactive to September 15 and reverse all associated service charges, taxes and fees.
• Process the full credit/refund for the device Xfinity received back on September 21 and remove any device-payment obligation.
• Confirm that no restocking fee will be assessed since I never received or opened the device.
• Provide written confirmation that the device and line have been completely removed from my account and that there will be no adverse collection or credit reporting related to this matter.
I can provide my order information, UPS tracking and proof of return, and account information privately to an Xfinity employee. I am specifically requesting escalation rather than another referral to general Xfinity Mobile customer service.