I deposited bitcoins but I cannot see them in my account.
You should see bitcoins in your account after 15 minutes (we require 6 confirmations before you can see them in your account). If it has been longer (and it has already been confirmed), it means that you deposited bitcoins into an address that had already been used. In other words, you sent bitcoins to an address more than once.
When this happens, you can contact us and we will fix it right away.
We strongly suggest that you don’t use the same address more than once for security purposes.