I'm having the same issue, also purchased this weekend and nothing has been sent to me.
I shall be checking my bank account to see if I've been charged, I won't be too impressed I've they take money at weekends but don't sent confirmation e-mails - there was no warning of this.
I've e-mailed support just to be safe, but I know they don't respond at weekends so I'll have to live without access to the game I've purchased.