unable to withdraw

To YUN SHANG HUI XIN LIMITED Dear , My account is 730007. The old account is 308134 of Titan markets limited. Now Titan company is merged with Yun Shang Hui Xin Limited company. I trade in MT5 and I deposit total money is 1408 $and tax of 566 $. I make profit and now total amount is 2831 $. Once I withdraw 110 $ to check my withdrawal account. that time they asked me to deposit 500$ as a security deposit. I deposit that too, and it’s added in my balance. The CS asked me to deposit tax of 566 $ while I fill withdraw form of my total 2800$ . After deposit the tax CS say you trade many times in a single day and you are using illegal software for trade and making profit. While I am using MT5 for trade. They must be have all my trading data. And after CS asking me to deposit more 500$ for inspection. CS say company will inspect your trade and data for trading many times in a single day. When I say CS I will not deposit more 500 , CS says our company will approve your withdrawal after verification of your account. While this is not a rules in trading to trade limited times. They are doing cheating with me for not giving my withdrawal. Now I am waiting for withdrawal and they are not responding me.