When I tried to withdraw, I was charged a fee of over 4.5 million yen. ..

After making a deposit of 250,000 yen on January 11, when I tried to apply for work, I was told that an additional fee was required and I was charged an exorbitant amount of 4.5 million yen or more. I was told that I would not be able to withdraw if I did not pay this fee, but the fee has already been deducted from MT5 at the time of transaction. Why do I have to pay? I would like you to refund at least the principal amount of $ 4420 without any fees. I've withdrawn 3 times so far, but no fees were required. The deposit amount is $ 8834.76, while the withdrawal amount is $ 4410. Please help me.