You're probably not going to like this ... considering your frustration level already ... but ...
So hosting provider has a script for you to install Moodle. But Moodle doesn't work. Seems to me their installer is broken. Since you've got a 6 mo. contract, get your $'s worth.
They offer shared, virtual, and dedicated hosting. Which is yours?
I see they have links to Joomla and WordPress hosting. Where is their link to Moodle hosting?
'spirit of sharing', Ken