Can not delete page from search results

I need help deleting a page from search. This is a translated page. I have already deleted the page, the page is deleted from all recycle bins. Same for the original page. The translated page is still showing up in the search results (this happened on friday).

What else I tried:

- Reindexed the SitePages library => didn't help

- Reindexed the entire SiteCollection => didn't help either

- Delete the page in the admin center (https://contonso-admin.sharepoint.com/_layouts/15/searchadmin/searchresultremoval.aspx) => Error message that the page cannot be found did not help

- New page created under the same URL (original + translation), published, deleted again => New page was in the search results, disappeared again, old page is still in the search results. So it didn't help either.

How can I really remove a search result from the search? I waited 4 days now and the page is still in the search results and everything I tried is not working properly.