Probably based on the normaan0 attached photo. Actually I didn't know that they had KYC already, cause before I used this exchange and was able to withdraw my funds without any hassle.

Maybe because it was a small amount like what you said. But your case 3k isn't small so that's why. But that's negative on their side if they banned you or doesn't react to support your inquiry at all. Smells like it's gonna be scam soon.