How to disable copilot on microsoft office (excel, word, ppt) on Macbook

I am using Office 2019. I am not using 365, although my Microsoft account says my 365 subscription has expired and I should renew. I have no interest in paying a subscription to use the same Office Suite I have already purchased in full. I am sick to death of getting the message: "BACK UP THIS DOCUMENT Allow Copilot on this and other files backing using OneDrive (License required)". I save and back-up elsewhere and do not want to also be paying an additional subscription for Microsoft Cloud services.
The moderator's instructions to manage Copilot by going to Subscriptions and Services are nonsense. For a start, there is no 'Subscriptions and Services' area, just subscriptions and look what you get when you go there - a prompt to 'Unlock more credits with Copilot Pro'. There is no option to disable Copilot.
I do NOT want AI interfering in my software. Fine if you do, but I don't. Far from assisting with efficiency, I am slowed down by constantly having to close the ribbon prompt to back up the document. If this keeps up, I'll be investigating alternatives.

Rubbish! It is not there. I want Copilot off my computer.

Thank you, this is clear and helpful information, even if it's not what I want to hear!

I changed my Microsoft 365 in April, just before the renewal date, and easily changed it to Classic. The price was $69, less than the $99 rate for my prior subscription. CoPilot is nowhere to be seen!

Many thanks to everyone who has replied. I think it is coming down the line, even if I can change back to classic for the moment! I'm not satisfied and hate the big cursor on Word documents, which gets in the way and is sometimes slow to work, which is very frustrating! But I thought it was just me having problems so it's a help to know I'm not alone.

My billing cycle just turned over a week ago. My next annual bill will hit March 2026. Are you saying I have to kiss the $130 I just spent on 2025-2026 goodbye and pay for an entirely new month or year just so I can switch to "classic?" This is all assuming I don't get stuck not being able to choose "classic" once I flush it down the toilet as per advisement.

Also I just now tried to create a new Microsoft 365 subscription with another email, and there's no sign of the word "classic" anywhere. I can't help but feel like this is all a joke at our expense and there is no such thing as classic outside of people insisting it's real because "the site says trust me bro so why not trust it."

UPDATE:

I'm currently speaking to a sales rep who told me this:

"Thank you so much for that, Microsoft 365 Classic that does not include AI at the price point you were paying prior to the price increase. The price is the same as what you were paying previously. But this can only avail on our end. And it's no longer available on the website*. The old version you want to get is no longer available to purchase on the website; we can only process it on our end. Shall we proceed to activate this so, we can refund the new price?"*

Also just a heads up, the delay on those text chats is around 60 seconds but it kicks you off after 300 seconds. It's definitely humans on the other end, so maybe just kindly send a "Thanks for taking care of this" or something every 30 seconds or so as a "bump" just to be on the safe side. Will update once the rep is done, but they did send a refund since the last 130 was deducted around 2 weeks ago.