Urgent Request for Immediate Service Cancellation - Extreme Financial Hardship and Repeated Support Failure

I am writing to formally request the immediate cancellation of my Xfinity Mobile service due to extreme financial hardship resulting from job loss and relocation. The situation I am in is dire, and I have encountered insurmountable obstacles in attempting to resolve this matter through multiple customer support channels.
Detailed Account of Challenges:

Current Financial Situation: I lost my source of income and had to change residence, which places a need to reduce all ongoing expenses to the barest minimum in the shortest period.
Prior Attempts at Resolution: I have repeatedly tried canceling my service through the following ways:

Text chat numerous times with live agents
AI support systems
Repeated direct outreach with Xfinity representatives through phone call

And yet, none of them has been able to successfully address my basic request-the cancellation of my mobile service. Every one of them has not only failed in doing so but has further exacerbated the problem.
Critical Context:

I am currently recovering from serious illness, and this adds to the pressure and agony of dealing with such administrative hassles.
The normal support calls have taken an inordinate and unreasonable length, many over two hours, which to me is unconscionable considering my health vulnerabilities and financial situation.

Specific Request:
I urgently require immediate assistance in the following issues and with extreme urgency for me:

To immediately cancel Xfinity Mobile service
Confirmation in writing of the actual cancellation date of the service
Written documentation of said service cancellation
No further billing

In view of the extraordinary circumstances and the support given to me that never did work, I hope my urgent matter is attended with expedited and compassionate service.
I am willing to provide any additional documents requested to validate my hardship or to facilitate immediate cancellation in service.