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An iTunes App Store representative will review your request and should send you a personal response within 48 hours. That response will include a record of your request. While you are waiting, you may find these articles helpful:
How to resume interrupted iTunes Store downloads
iOS: An app you installed unexpectedly quits, stops responding, or won’t open
Countries and regions where iTunes App Store is available
This is your case number: 705016748
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iTunes Store Customer Support