Possibly.
Other than a support ticket.
I can only suggest to start from scratch at this point.
You can re-upload a virgin copy of the same version following the upgrade docs for what files to upload.
But don't run the upgrade script.
Then go through the file/folder permissions to ensure they are correct,(Again for what the third time)
Also make sure you backup the config.inc.php file so it is not lost.
But all this could also be due to connection issues with the host.
Where you loose connection to the database and the scripts do not complete updating the tables.
This is a hard item to guess what is going on without getting into the nittygritty
