I’m sorry that it doesnt seem to work for you, but we provide hestia as it is - our license doesnt include any support or warranty. Also we can’t help you with guides or information for every single step, a restore should work, why it doesnt work in your case, I can’t say.
If really 20 people relay on your skillset in combination with hestia, you should consider to get help from a sysadmin or switch to anything that fits better to your needs.