Advisme Tricked me into working for free London England

This is quite a clever scam that appeals to people's vanity (don't they all). First off, these guys will contact you offering consultancy work for one of their (real) clients. The idea is that you have an initial call with the clients and, if that goes well, there will be paid work down the line. What's actually happening is that the clients, who are generall well known VC companies and the like (and who probably don't even realise you're being scammed) are only interested in the first call as they're doing an industry survey and want the opinions of as many people as they can get. After that, there's no follow-up work and no more contact from Advisme. They take a large fee from the client, you get paid nothing.