Nedbank prepaid electricity voucher not received

I purchased prepaid electricity this morning around 8am - on the bank's new website. I still haven't received the voucher. My account shows that the amount has been debited (R800). I spent at least 40 minutes on a "live chat" and the agent said she'd log a case, ref no ***0. I've also tried sms banking to get a resend of the voucher - it doesn't show today's purchase. I never had this problem before. I'm sure it's to do with the fancy new website - with which I have serious other issues but that's for another day.