I have all the proof they are a scam.

i recently met someone online on the website badoo. after a few days of talking, we moved the conversation to WhatsApp and had a brief video chat. after a few days of talking , we are talking about cryptocurrency and other random topics. she introduces me to this dapp platform and shows me it as a futures exchange for the price of BTC. i slowly start with a small amount of money and I make a couple quick wins and can withdraw usdt no problem. i decide to increase my pool and I'm still able to withdraw money. i decide to move some more assets into this app in hopes of gaining larger sums. the person I'm speaking with is telling me how to execute trades and it seems to be going well as there isn't any issue. once the account grew to 980k, I attempt to withdraw a small sum and I am suddenly blocked. the person I'm speaking with said I did something wrong but I hadn't experienced this ever. i spoke with support and they demanded I send another 50k to pay a withdrawing fee. at this point I realize I am scammed and have lost all my money.
Luckily for me I contacted the SEC who got all my funds back using the detailed I provided to them.