I sent to them through using iTunes "Report a Problem", for a track missing in an album I bought. The answer I got:
Your request for a refund for "_________________" was carefully considered; however, according to the iTunes Store Terms of Sale, all purchases made on the iTunes Store are ineligible for refund. This policy matches Apple's refund policies and provides protection for copyrighted materials.
You can review the iTunes Store Terms of Sale for more information:
iTunes Store Customer Support http://www.apple.com/support/itunes/ww/
(it says: Sincerely, but the reply was nothing Sincere)
So they just send template answers... I also reported that another album I bought did not show up in my iCloud at all and I hope to have it back on iCloud, and I got the same template answer. How can this iTunes / iCloud issue be solved?