Zhongyuan Futures offers very high service fees without noticing the client its changes

Zhongyuan Futures in June, my trading was very normal. I made some money on the platform but did not withdraw the money. In July, its service fees were suddenly changed without informing the client. The service fee is very high, which made the position getting heavy resulting in a loss. Communication is fruitless and I don't know how to protect my rights. I want to remind everyone to pay attention to these scam platforms. This is completely fraudulent. The pictures are the fee that they send me when I started to open an account in June and the one they sent me in July.