Do not use SCAM WEBSITE BTC exchxdeal.com

Hello, Good Afternoon I sold a game account of a game name Summoners War by 4300$ thought this website. The buyer released the funds and I transfer him the game login and password. I read all the conditions of the website before accepting the deal so I was aware of the nature of the trading portal. I read fees and conditions to be met in order to withdraw the money. At the moment of withdraw they asked me to verify my authenticity by sending an amount to check that I was a real person. Then after it was completed, they told me In order to withdraw the money I needed to buy an insurance to avoid the bitcoin to be lost in blockchain. I refused since they explained they were going to mix the coins in order to avoid to be lost and that is not true. I told them to release the lock, and after that I tested by sending 0.006 btc to a wallet in coinbase. After 30 minutes I did not receive it, and contacted back for a hash or transaction ID to track it online thought the blockchain. Then they stopped answering. After an hour I needed a explanation of where is the money and what is going on. So they send me a message that my account was blocked due suspect of money laundry. That they will hold my account funds. The sent transaction never arrived and I did not receive a transaction ID. It seems like a scam from them. Even thought the remaining amount is still listed in their website and is good since it received a part that I sent to check if it was really a bitcoin address. I checked while I was doing this claim and they closed the message center messages. Im still unable to withdraw since it is not safe. I do not want to remove more btc from them since it looks shady no transaction ID no refund from initial payment.