I can't access my other Q&A Community account.

Question

That account: https://learn.microsoft.com/en-us/users/kaixiugao/qna

I can still access my profile page. However, when I try to post a topic in one of the communities, the site prompts me with "You're signed in as xxx@xxx.com - Before registering with this Microsoft Account, please check if you may have previously registered with a different account".

Even if I follow the process and keep clicking Next, the site will eventually tell me that I have completed all the steps. But when I try to use the Q&A community, I get the same "You're signed in as xxx@xxx.com" message. It's caught in a dead end.

About a week ago, I reported about ten users for posting offensive content such as gambling and lottery tickets in the Q&A community. But in the end, the system decided that they didn't violate the rules because they were posting in Chinese and adding spaces to their characters to confuse the AI verification system. I suspect that my account is no longer working, probably because the community mistakenly believes that I'm reporting people in bad faith.

Thank you so much!