You're right to be scared and you ought to walk away from this company. Behavior like this is the hallmark of an unregulated investment firm, literally all of which are scams. Xinvexeo is just one more fly-by-night crypto broker, looking to run off with your money. Because they are unregulated, sites like this make their own rules and do as they please. There is nobody to stop them as they are trading illegally in the first place and are outside of the reach of the law.
All of these bogus brokerages have a handful of things in common:
Typically, they are very new and they hang around only until the scam alerts about them build up. Then they disappear into cyberspace with the money. They typically require a small opening investment and when it does well, they may even let you test the waters and withdraw something. But then they turn your account over to an agent who induces you to make much heavier investments. Once you do, that's the last you'll see of that money. They find one way after another, after another, after another to keep you from getting your money out.
The domain registration for this website tells me that this site is only 134 days old. The domain name was only registered on February 17, 2021 and for one year only, the least amount of time you can register a domain for. That means it can disappear from the web at any time and your money with it.It is not registered with Companies House, nor is it authorized by your Financial Conduct Authority to operate in the UK. In short, there's no reason to believe that the firm is real and no reason to believe that they will ever give you back your money if you invest with them.