Restore Offline PrestaShop Dog Food Site

My dog food webshop, built on PrestaShop, has been offline for over a year due to a server hack. Our hosting provider lacks backups. We need a freelancer to:

- Diagnose the "Service Unavailable" error
- Restore the site using server login and old data
- Utilize original PrestaShop theme files

Ideal Skills & Experience:
- PrestaShop expertise
- Server management
- Website restoration and troubleshooting

Please provide details on your approach and relevant experience