The spread adjustment is outrageous

I made a successful withdrawal after making a profit. But the platform just changed the spread, which is outrageous. It is 10 times to 30 times higher than at the beginning. At the beginning, the spread was only 30. After the profit was made, it became 300+, even 1,000. I consulted customer service, who said that the spread is determined by market fluctuations and cannot be modified in any way. They actually use this method to limit traders' profits. If you don’t have money to allow users to withdraw money, don’t build a platform. Is it reasonable that I lost money? When customers make profits, the platform will play tricks and higher spreads. This platform is untrustworthy.