Demanded additional outside money - Scam exchange

Mexo financial ltd has a trading platform however when trying to withdraw funds from my account, I discovered that they insist that taxes be paid on the withdrawal amount using outside additional funds only (no withholding of account funds is permitted). They gave  me a nondescript wallet address that cannot be verified as anything beside a wallet address, I was not only scammed out of all of my profits but they froze the account and refused to release any of the original deposited funds as well. I attempted to adjust the withdrawal amount to be less than the deposited funds however they refused to complete the transaction insisting that I pay taxes on all profits using outside funds before they will release any funds. They asked for proof that I paid the funds which amounts to a screen shot basically and black listed me on chat so I could not send them anything even if I had paid the so called taxes and then deleted my account altogether.  Zero stars. Mexo is a scam site. I of course did not pay any additional funds to the wallet address they provided and was scammed out of over $120,000.00 USD from the original deposits there as well as the profits from the trading. The total in my account is $481,495.83 USD. Furthermore Mexo has no working email.with which to conduct correspondence with a real person in the corporation. https://www.mexofx.cc/ The email provided: info@MEXO Finance.cc is invalid.The MSB registration number: is registered Legal Name: SSJTCF GROUP LIMITEDDBA Street Address: FLOOR 1 OFFICE 25 22 MARKET SQUARECity: LONDONZip: E146BU UNITED KINGDOM.My account was frozen at first, then they disabled chat and then they deleted the account.