If you are not happy with the purchase return it—
You have 14 calendar days to return an item from the date you received it.
you have a limited 14 days for an exchange or refund for any reason—see Returns & Refunds Order status
Returns & Refunds - Shopping Help - Apple
Only items that have been purchased directly from Apple, either online or at an Apple Retail Store
After that it is a warranty repair, and can take weeks...if they find it a defect.
Your 90 days of complimentary telephone support begins on the date of purchase.
Call Customer Support (800) MY–APPLE (800–692–7753)