I cannot find how to change membership levels for subscribers with paid plans other than cancel their existing membership and ask them to wait and sign up again for a different level after the end of their current subscription period. Surely, there is a better way than me manually deleting them and then asking them to sign up again at a different level. What am I missing here?
This forum is for code related issues on your page.
As you are using Wix Paid Plans, that have their own support pages.
https://support.wix.com/en/apps-made-by-wix/paid-plans
https://support.wix.com/en/article/viewing-and-managing-paid-plans-that-clients-purchased
https://support.wix.com/en/article/request-allowing-paid-plan-customers-to-manage-their-subscriptions
Then you are best suited contacting Wix Support about your issue.
https://support.wix.com/en/article/contacting-wix-support
thanks. these links are helpful