No one to take the calls... Holdings for 40 minutes

Worst experience ever! I purchases prepaid electricity in the morning and received no SMS with my vouchers code. So I called stabdbank and was transferred to the prepaid department I spend 20 minutes of my time waiting for someone to answer,eventually I ended the call and I called again on ********** 000 and the 2nd agent tried her best to get ahold of them but again we waited for a further 20 minutes. Now standard bank my prepaid lights will be out when I get home should I not have a respond with a solution... Wat should I do to recharge lights.... Sleep in the dark and not have dinner tonight? This is outrageous and I expect a response as to why the poor service... The manager from the prepaid electricity department is to me as I want speak to anyone else!