Can't add ring protect plan. Website stuck in a loop.

I can't subscribe to either the regular or plus pans. After logging in (via the app or via desktop browser), it shows that I need to update my subscription. I click on "subscribe" and then select "Choose Plus" (the top one does nothing, the one under the feature comparison table links properly) and it takes me to the device dashboard with a "choose plan" option. I click that, and it takes me back to the subscribe page (where I just was). I think this is because my credit card expired. I've updated it, but it won't let me subscribe. Help!