Customer service has confirmed that you won't have any problems. So you can use the exchange. But I would still be careful, anything can happen. And by the way, may I ask why you went through KYC. The exchange allows you to use its services without that. Or you are not satisfied with withdrawal of 10 BTC per day? I, for example, use the exchange without going through KYC.
Because it didn't make sense to me that I was able to trade without KYC from a prohibited country. So I wanted to KYC because I didn't want to get fucked later. I wasn't sure what was going on. User Agreement says Canada is prohibited. So I figured that KYC would for sure fail. I was quite shocked when it approved. So I don't know why this is happening. It's very confusing. I didn't want to find my account frozen then they ask for KYC and it fails. If I do KYC first, hope it won't be an issue. I don't know