Make sure you've followed the steps here: https://gaming.amazon.com/loot/risk
If you are not receiving items, double check your RISK Account is linked here: https://www.hasbrorisk.com/login?referer=amazonClaim
If you run into any issues, please contact us: https://smgstudio.freshdesk.com/support/tickets/new
Please Note: to claim each Amazon Prime Drop you must log in to RISK after you claim it