I did not know you had to put a bank account there too. But, if you click on the 'Withdrawal' link you are not able to withdraw funds from your USD account until you add a bank account.
I just added the exact same account I used with EE the past 4 years and I also now get the message that my account is not verified and that I should contact them.
So, with about $400 in shares in my USD account I am stuck too and unable to withdraw funds to SA right now. I will contact them on Monday and if this is said to me too, I will use attorneys to get all transactions reversed, because this was never mentioned by EE when I applied for my USD account last year.
If you really do have an EE account and applied for a USD account, and are not spewing BS here, then go to that section and click on the menu and then go to Withdrawal. Try to add your bank account, in fact, any South African bank account and see what happens.