Hi, my name is Tiago França.
About you site, I can try to recover, but if I can't do it, I will return with the result soon time, inside 1 or 2 hours a hope to have a response (if is possible or not).
If is possible the recovery, I will need few hours to recovery. But because my regular work, I can only to work in your project some hours by day.
If the recovery finish successfully, I suggest implement some security steps to this no repeat in the future.
You only pay if I can recovery it.
It may be necessary to rebuild the system.
If you don't have data that you need to recover, I suggest you hire someone to rebuild your system. It can be cheaper and have less headache that way.
In the future, limit some powers to people you don't know or have someone with knowledge to do it for you.
I am PHP developer, specialist in web security, Linux administrator and data security.
I work with IT since 2009, in web since 2012.
You can contact me for more info.