Anyone have challenges not being applied to your account?

We got the e-mail saying if you did not complete a challenge every 30 days you lose your silver status, etc. We have connected our account to Twitter and successfully completed close to 12 challenges in the last couple weeks and none show up on our notification page. We do the tweet or watch the video two times to make sure it was a success. Our Twitter is public. Coke needs to cancel the plan to make people go down a level because the system in not working for us and we know several others with the same problem. What is their reason for requiring a challenge per 30 days. We do not want further status or different catered rewards. We want to enter codes and keep our current level but the challenges we do are not making it to our account.