got the same reply from them. seems that they have a template to reply. just click and send click and send...
Good day! This is Karen, your iTunes Store advisor. I look forward to providing you with excellent support today, and I hope that you are enjoying your day so far.
I'm sorry to hear that you've not yet been able to upgrade to OS X Mountain Lion because the code you received could not be redeemed. I realize that you hadn't in fact used this code already and that you'd like to begin enjoying the features of Apple's latest OS. I'll be happy to assist in getting this resolved.
To be clear, customers who purchase a qualifying new Mac computer between June 11, 2012 and July 25, 2012, that does not include OS X Mountain Lion can upgrade to OS X Mountain Lion for free. To participate in this program you must be entered by August 24, 2012.
I'm sorry to hear that on redeeming the initial upgrade code you received, you were unable to proceed because an error indicated the code was invalid or had already been used. If your claim is accepted, a valid replacement code will be sent to you by email. There will be no need to submit a new claim. I apologize for any inconvenience in this regard.
Please let me know if you do not receive a replacement code within 24-48 hours, as I'll be happy to look into things further for you.
I would like to share some additional information regarding OS X Mountain Lion that may be helpful for you.
The following link provides comprehensive information on Apple's OS X Mountain Lion Up-to-Date Program:
http://www.apple.com/osx/uptodate/ <http://www.apple.com/osx/uptodate/>
To learn of the system requirements to purchase OS X Mountain Lion, please review the following link:
http://www.apple.com/osx/specs/ <http://www.apple.com/osx/specs/>
To see information about the new features with OS X Mountain Lion, please review the following link:
http://www.apple.com/osx/whats-new/ <http://www.apple.com/osx/whats-new/>
I hope this information is helpful, and thank you for your interest in OS X Mountain Lion. Please let me know how everything works out. I'd like to be sure that this has been resolved this for you. Take care and have a nice day!
Sincerely,
Karen
iTunes Store/Mac App Store Customer Support
http://www.apple.com/support/itunes/ww/