Many of my customers are unaware that they can take advantage of developer support in the form of MSDN incidents and you may be entitled to use up to 4 dependending on your subscription level.
You can see what level of subscription you have via the "Access benefits" link. Then get ready to articulate your toughest developer problems 😉 Priorities can be associated with an incident, and we have experts on the other end, be it Entity Framework and WCF or TFS and Microsoft Test Manager.
So please do take advantage of the benefit, your benefit.
If you do not have access, you may want to ask your Dev Lead or Manager.