If you just exchange your coins and request a withdraw right away, they will really consider it suspicious considering the amount. I think other exchange will do the same (ask for KYC).
What did they say in their last reply? If you have submitted all the documents needed, then you just need to wait. Tbh, I consider you lucky for receiving 2 replies from them within a short time span. It took months for some before receiving even a first reply.
There have been several scam accusations and compalaints made against them, not only here but also in different platforms (it will show up when you google it) . I can't totally say it's a scam exchange, but I'd rather stay away and play safe than take risk.
Oh, thanks for the info, well, I'm still waiting for an answer from support. I guess ill find out during the week if my coins are safe or not, last time I use this exchange for sure, I guess it is better not to take the risk and stay away.