People still use FTP these days? I remember using FTP with FileZilla long time ago.
I still use FTP on my local network, where I don't mind the lack of encryption.
I would demand partial/full refund.
It's paid per month, and really not worth the effort. I'd much rather have them fix the problems so I can finally keep this data online. I've uploaded it too many times already, and the whole point of having it on a server is so I can access it when needed.