Prepaid Electricity via App - Wasting my money

I bought prepaid electricity via the Standard Bank App - the money went off my account and I received an SMS confirming that. However, NO VOUCHER received. Thus, wasting my money. I've tried to buy again... Same problem. And again. Three times and the problem still existed. Will I ever get my money back or receive the prepaid voucher (token) that I paid for? Come on Standard Bank... Raise your standards please.