Hey, I'm sorry about that. Have you tried to clear the cache and hard reset (power cycle) your system to see if that helps?
If you continue to run into the same issue with your tiers the best suggestion would be to head to official support. They will be able to gather more information and assist further as soon as possible:
Contact Us (Live Chat):https://support.activision.com/contact_us
Twitter Assistance: https://twitter.com/ATVIAssist
Facebook Assistance: https://www.facebook.com/ActivisionAssist?fref=ts
The live chat with an Activision agent should be available on the contact us page. The chat hours are from 11a.m. - 7p.m. Pacific Standard Time