Was the "GO TO HELL" really necessary? Frustration is understandable, but what do you gain from abusing a customer support person at a large and influential technology company and then vanity posting it to the internet?
Let's say the recipient of your "Dear Apple" email decided to forgive and forget; what you've got left is an announcement to the rest of us about your inability to be civil under stress. Temporary relief aside it pays to be polite. Even on the internet.