I received this email within 24 hours of contacting the iTMS customer service about my issue:
Dear Kevin,
I understand you didn’t receive “Dark Side of the Moon” with your library upgrade. I know how I’d feel if someone told me I couldn’t have a higher quality version of one of the greatest albums ever made. That is why I’m happy to be handling your case. My name is (xxxxxxx) and I’ll be your direct link until we reach a solution.
Apple is currently working toward a resolution for the issue you have reported. You will receive an email after the matter has been investigated and further information is available. Thank you for your patience. I want you to have a stellar entertainment experience.
In the meantime, since you are a valued customer, I have issued 5 replacement song credits to your account “(xxxxxxx)”, which you can use to buy the individual songs of your choice from the iTunes Store. You can use them on other songs for now, because I’m confident we’ll get the Pink Floyd issue resolved soon.
It’s nice when customer service personnel share your good taste in music.
I was just listening to Stevie Ray Vaughan - Little Wing