If you have premier support (which it sounds like you might), you can create a ticket in your LCS project. With your valid Live ID, go to lcs.dynamics.com and create a support issue.
If you don’t have premier support, you can go through the normal channels at support.microsoft.com. If you don’t have pre-purchased tickets, you’ll have to click the AX 2012 link (that’s not through Partnersource) and create the ticket there.
Most partners also have some advisory hours or tickets that they may be able to use on your behalf, as well.
-Jake