This can be a little tricky, as you have seen. Without being able to access the tabs in the profile, it's almost impossible to submit an Unresponsive Profile Manager form. However, there is a clever workaround.
If you go to any profile, even one you are profile manager on, and find the Unresponsive Profile Manager form there, and click on it, you will see that it comes up with the WikiTree ID of the profile you pulled it from. I pulled this link from the Wiggins profile I was working on today.
Unresponsive Profile Manager Request for James Wiggins (wikitree.com)
If you then edit it - remove the WikiTree ID from the end of the address line, and add the one you want (in this case, remove Wiggins-3853 and add Dudley-1623, then hit enter, you end up with a UPM form for the one you want.
Unresponsive Profile Manager Request for Dudley-1623 (wikitree.com)
Or you can just email the Admin account at info "AT" wikitree /DOT/ com and they can assist as well.