Hello ! I'm Nelson and I would be glad to assist you today, I'm sorry that you are experiencing this issue.
Since you are having issues logging into your Bing Webmaster account, I suggest that you contact Bing Support website here. https://www.bing.com/feedback/windows
Also, you may find this article for Support for Webmasters and Site Owners helpful.
https://www.bing.com/webmaster/help/webmaster-s...
Should you have any other concerns, don’t hesitate to let us know.
Thanks, hope this helps
Nelson...