For Beatcoins not received via the Offerwall, you'll need to get in touch with Tapjoy directly:
- Go to the Offerwall within the Music Maker JAM app and click on the menu at the top left
- Click 'Reward Status'
- Click 'Not Rewarded'
- Select the offer that you completed (it may take up to 72 hours for the claim option to appear)
- Fill in your email address, a quick description of the issue and attach some screenshots which provide evidence of your claim
- Accept the 'Terms of Service'
- Click 'Submit'
For further details please see the 'FAQ' section of the Offerwall menu.