Unable to Withdraw Investment Funds from Goldman Sachs Trading Account

I deposited funds into my Goldman Sachs account for stock trading. When I needed to withdraw my money, I was told I had to pay an additional ₺150,000 as their share before I could access my funds. I explained that I didn’t have the amount and suggested they deduct it directly from my account, after which I would immediately send the payment to the requested account.

They refused my request and subsequently locked my entire account and all related connections. I am now unable to access my money.

I have saved all communications and records of this situation. What steps should I take to resolve this? Is there anyone who can assist me? Goldman Sachs, I demand immediate action to unblock my account and return my funds!