I was previously planning to use their services before because I had some coins that I can sell to Okex. Since I do not know if I can trust their service I tried to find reviews here in the forum and

I found that some of their reviews telling that Okex is a scam and some of them telling that Okex is not a scam. So, I decided to do not use their service because there are many complaints about their services.

I can only advise you to try to contact them and wait for their response. If you do not receive a reply make a new thread on scam accusation to let others know that Okex is a scam with your proof.