Go to them
Sage advice at Cultural Offering. An excerpt:
Go to them. When you are not happy with a business experience, don't tweet your disdain, go to them and explain the problem. Then ask for a resolution. Not happy with your grade on that paper? Skip the snarky Facebook status and go to them. Articulate your concerns and walk through how you might improve. Boss not so understanding of the problem you are facing? As satisfying as the social burn may be, why not exercise your diplomatic skills and try to improve you lot by having a meaningful discussion?