Thanks for your message, I would be happy to point you in the right direction with this. It looks like you have some outstanding charges on your account that would need to be cleared before selecting a new billing cycle, as the error notes. This is not something we would be able to take a look at via our community forums, however, I would recommend reaching out to our live support team to take a look into this with you. You can do this by logging into your store through the Help Center, searching your question/issue, then selecting "continue" at the bottom of the page that displays the search results.
I hope this helps get you on the right track, feel free to reach back out here with any questions about the above information!
Marty | Social Care @ Shopify
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