Cannot migrate from iOS standalone vault hosted in iCloud to 1Password subscription

Update: I more or less fixed it myself, but lost favorites etc. I manually moved items in bulk from one vault to another. This process should have been shared with me a week ago. The original auto-migration failed; after not hearing from support, I tried it again myself creating duplicates; then when support responded, they suggested I try it again, creating triplicates. Then support went silent. I like the app when it works correctly, which until now had been 100% of the time, but the lack of support is truly the worst I've encountered online. When dealing with a paid service that handles sensitive passwords and secure notes, functional, helpful, speedy support should be priority #1. I'm deeply disappointed.