Unfortunately I also made the mistake of transferring coins on Coinexchange.io and I'm not very happy about that. It happened 2 days ago, I transferred a considerable amount of satoshi and start trading. After a couple transactions I received a message saying 'Access denied Error code 15 This request was blocked by security rules'. Don't know what security rules I broke by just trading. Seemed weird at that time, but I did not worry.
Anyways, I tried to login again, but it kept returning invalid credentials. After several attempts I tried to change my password. I received an email from Coinexchange.io support with a link to reset the password. It didn't work again invalid credentials. I tried to reset the password a few times, but I couldn't login into my account.
I opened a ticket on support #48703, almost 48 hours have passed since that moment and still no answer form Coinexchange.io support. Now I see multiple posts regarding withdrawal problems and account lock downs for no apparent or justifiable reason. If there's any moderator that can give us some answers about these problems, that would be great.