I think we have to look at this piece by piece.
According to past posts and youtube videos, the virtual private server (VPS) as marketed by Kaizen Global and Reza Mokhtarian is a separate product ran by separate company such as Amazon. A typical VPS for trading usually hosts an MT4 program and is always on.
It must be said however, that no company can guarantee 100% availability, the highest is 99.999% availability and this is usually available to extremely large corporations. In this regard, the VPS provider may have had an issue that caused the problem and you should have raised a support issue with them instead of Kaizen.
Other scenarios could involve:
1) Kaizen's system could have suffered an outage.
2) Reza MOKHTARIAN allegedly does not use stop losses (see darkfast's myfxbook), perhaps an open trade went horribly awry (think the famous EURCAD trade), perhaps you were margin called and over-leveraged.
3) If you had used stop losses, a VPS outage would remove those stop losses (and take profits).
You would have to look at the brokerage statements to see what exactly went on.
My personal opinion, though without seeing any proof whatsoever, would be Reza's poor trading and lack of risk management on those trades as the likely culprit based on many social media reports and reviews on FPA.
You are unlikely to recover any money. However, I suggest you file a complaint with your country's securities regulator:
My name is, NAME, I was solicited by a company called Kaizen Global. Kaizen Global offers a trading service of off-exchange foreign currencies through an "autotrader" called the Kaizen PMS which links their computer trading system to individual trading accounts at a forex broker. I suffered a monetary loss of $ XXX USD by using this product . It has been brought to my attention that Kaizen Global may not be registered to in a lawful capacity to provide financial advice, investment guidance or to trade securities.
It has also been brought to my attention that the owner, CEO, Reza Mokhtarian, of Ontario, Canada has been charged with a count of fraud by the Ontario Securities Commission (OSC) in September 2016.
Hopefully they can put a warning out. If there are enough warnings, it is possible to get this company shut down.