Usually if it's the verification of logon from an unknown IP or similar it is within a few moments. Check your spam folder and make sure you really used the email addy that you think you did (might it have gone elsewhere?).
Did you get a response/any help from CS? My brother bought the game on Saturday and still haven't been able to activate his account. Worst support I've encountered tbh. They answer maybe once a day, always different people with pretty much the same answer/suggestion and now it's been silent for 1,5 days. Kind of like they don't read the previous emails before they reply.