Dear Stan, I have exactly the same issue using the Microsoft 365 Family subscription, so I feel permitted to answer your question:
On step three, there is no option to switch or downgrade to Classic plans. Instead, I have only either the button "Switch plan" for Microsoft 365 Personal (which is not what I need), or the button "I don't want my subscription" (which I'm afraid to click, because I could lose my data).
Can you please clarify internally why I don't see the Classic plans offered?
I had this and spent ages on with MS support so I will post this here for ease for people looking for this:
You have to go to Cancel Subscription - not Manage Subscription. it will offer you 2 free months and also underneath it should give you the option to downgrade to either Microsoft Family Classic at £7.99 per month, or to a Personal plan.
I agree, this Copilot is intrusive and maybe had it been implemented in a better way, I may have taken it up. However, the enforced price hike for something I didn't ask for along with it pushing Copilot in front of my cursor while I type is vulgar at best and my immediate reaction is to terminate it. Same with auto-suggestions. I know how to type, and what I'm typing - leave me alone Microsoft. /rant