That appears to be a bogus link for me as well. I went to partner center, logged on and went to create ticket and got below but then I've never tried before so have no idea, my account may not have the required level.
"You don’t have access."
"We don’t recognize this account"
but then got to this page which you might try.
https://support.microsoft.com/en-us/supportrequestform/83cdfd8d-c24a-fbe4-fb2a-3fead30613a9
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