Poor service

This morning I purchased prepaid electricity from my nedbank money app and immediately the amount I purchased for was deducted from my account but I did not receive my voucher to load my electricity so I than called nedbank to assist me with my query, The lady I spoke to advised me that I have to wait 3 to 5 working days for this to be resolved which I find absolutely unacceptable because of the fact that I purchased the electricity because I needed it. I feel that surely there should be more they can do to assist other than telling me I need to wait 5 working days.