What you need is to take legal action but I wonder why you don't check the exchange review on this forum before you use it. Besides, I checked their review on Trustpilot it's really bad which means you're not the only user who is the victim of the exchange shady habit.
Please guys always do some research about the platform you want to use, the bull market is coming and this is the season when some theft use different strategies to steal crypto from innocent people.