Solution below
Hello everyone.
I have been in contact with the CWP support, and instead of them getting SSH access, and fixing the problem for me, they sent me a solution, which I'm delighted to say actually worked!
What you need to do, is to SSH into your server, and as root run the following command.
chattr -i -R /home/*
This will remove the "Immutable" attribute from all files within the home directories.
I hope this solution will also work for you guys.
Kind regards,
Fox