They said I need to upgrade account to institutional as they dont allow this trading on individual account ( here comes the scam) so to upgrade I have to deposit 5000$ and agree to new terms, I deposited 5000$ then the upgrade requirement changed to 10,000$.
This was a huge red flag and I am really sorry that you fell for their trick. No legit exchange would ever ask you something like that.
Having said that, I think that you should create a topic about it in
Scam Accusation board where you will provide all the evidence: screenshots of correspondence, you depositing money etc. It is unlikely that you will ever get your money back, but at least we could tag and flag their account and hopefully save someone from doing the same mistake you did.
Sure I will create a new thread today with all screenshots, 5100$ gone and when I did chat with the support there's only one guy there random times of online and replies that you should think before you do such trade as buy low from one exchange and sell high on our, now the only way to get back your money is your account assets equity should be atleast 10,000$ to apply for upgrade of an account to Institutional account then you will again have access to your money or it will stuck forever, then he said or wait until the coins you added, if their value goes upto 10,000$ then you can apply. But the main trick is, when my account was restricted it asked me to upgrade and the requirement for upgrade was Assets equity = 5000$ min and when I deposit more money it went upto 10,000$ and that's for sure when someone deposit 10,000$ it will go to 20,000$ and so on. Well I have never got scammed but this time I got scammed it is very simple and smart scam at the same time, they let you withdraw for once or twice to get the trust then blocks the access. Stay safe fellas. Adios