Thanks for looking into it!
Unfortunately I can't access anything on the Plesk panel right now except a single page that says "Subscription was suspended. All your sites are not available."
Also, on the usage stats it shows "Disk space 525.8 MB used of 1000 MB"
I'm assuming Krydos you've deleted the access logs? If not and it's still the issue, feel free to "tail -c 100M" them and I can go from there
Also, if that's easier/possible perhaps you could stop the website itself but allow the Plesk access so I can delete files and clear database there and then we can re-enable it when it's done
---
Update:
I've deleted more log files using the FTP and the disk usage went down to ~250 MB
I also had a chance to analyze the access logs and restricted more crawling bots which significantly reduced the load based on the dashboard page graphs
Please let me know if there's anything else I can do to help!