If you believe you have the correct number of check-ins and your giveaway did not start on time, then try restarting your app.
Sometimes it may take longer than expected for your GPS signal to reach us. Try waiting 1-2 minutes on the check-in screen. Also, make sure that you are connected to wifi if possible.
First make sure that your phone is set to allow notifications.
Please email us at email@example.com and we would be happy to connect with you!