Export teams data chat history but failed

Want to export the data from organization teams but failed.

I'm in "Free (classic)" as the team but under my @hotmail.com account

So I have to switch the account type between "personal use" and "Org."

Goal: Export the chat history, "Teams" board data.

To export the data, I tried all the ways here, but all of them failed.

1. https://privacy.teams.live.com/ui/en/dataexport But the chat history can't be downloaded after it showed up. And the "contact" I downloaded in the same page, just showed the contact I have on "personal use".

2. I followed here to take the screenshot: https://www.technipages.com/microsoft-teams-export-chat-history#:~:text=Check%20the%20status%20of%20the%20export%20page%20under,how%20you%20can%20export%20your%20Microsoft%20chat%20history
But every pages are too big to take screenshots, it would ask" are you still there" in a period of time when the program is still running. So I can't finish it for one page.
And it's impossible to do with chat history of course. Sometimes chat history wouldn't show up when scrolling but searching keywords.

3. I went to business account support, and couldn't log in as @hotmail.com. Phone support also said it's not supporting for "Free (Classic)".

4. I saw the API key page, but I can't start it. I don't know how to start it plus I don't think I can use my @ hotmail. com to do that. Neither upgrade my account to do that under hotmail.com

5. I can't even copy & paste. Sometimes chat history wouldn't show up when scrolling but searching keywords. 

6. When I posted this post, I couldn't post ! It said "Correct the highlighted errors and try again.", then said" Post flooding detected (user tried to post more than 2 messages within 300 seconds)"

What happened??

Please help me.

Thanks