Need live support to get rid of Copilot and resolve billing

How do I contact a live support agent to get rid of Copilot and address billing issues? I need a passkey but cannot get one or contact a live support agent any other way the system has been running me around in circles. When I call the support number I need a passkey. But I cannot get a passkey under my admin support options. I subscribed directly through Microsoft and am the admin and sole user.

I urgently need to get rid of Copilot from Word so I can use a specialized AI software for my business. It is designed to work in Word but has known conflicts with Copilot. The new software suggests change to my documents but cannot implement them because of Copilot. This interference is a known issue. Buying a second Business Standard subscription without Copilot and switching to that has not resolved the problem. I have tried logging out and in again, and clearing my cache. I am using the desktop version of Word.

Billing and subscriptions are also an issue. My Business Standard plus Copilot subscription says "expired" and the three dots by the product don't give me any option to cancel or manage the subscription. But I also got a notice on June 18 that the annual subscription had been renewed, and that it will renew again in one year. I have not paid the most recent invoice. I don't want to test whether I would get more options by paying, since I don't want the copilot subscription and it is marked expired.

I would appreciate any help on (1) disabling Copilot without disabling other connectors and (2) contacting a live person to address billing issues.