Hey there @kywi,
I'm curious if you use the cPanel email on your hosting because this sounds like your email may be compromised. Where are all the files located that are taking up the space?
You can troubleshoot a little more by going to your cPanel, searching for Disk Usage, and it will give you an idea of where most of the files are.
Once your issue is resolved,
please be sure to come back and click accept for the solution
If you're having trouble finding your hidden files and deleting them, please check out this video walkthrough for accessing them through your GoDaddy hosting manager: https://www.youtube.com/watch?v=2wOn3yjMPOs.