Thank you for the comments. It is appreciated. Unfortunately it is easy for me to be wise after the event. I was naive and let my guard down. I should of course asked questions before, but was new to this form of investment and did not. My mistake and one I regret.
The two exchanges that seem like scams are
https://ex.cash/ SEET
http://add-ex.io/ PCT
I doubt very much I will ever see my money again. Naive yes, but definitely a victim of some real low life criminals.
My advice to anyone reading this is never trust a Chinese girl on Tinder. Tinder is absolutely full of pretty Chinese girls from Hong Kong and mainland China. Often they put their location as London or somewhere in the USA or even just stick to Hong Kong or China. They feed you a story over days or sometimes weeks, send photos on holiday, in their cars, even with their families......very believable to. After I was a victim, I went back on Tinder to research for my own interest....After contacting 20, all (100%) of them tried to tell me about crypto and all tried to start the scam story.
I was very stupid and it will not happen again. But I write this just to warn others. I would not want to see anyone else get scammed of their hard earned money. Tinder is awash with this. It seems mainly China and Hong Kong are the geographical locations for these low life's to operate from. Beware. Thanks for the comments.