Bad customer service

I have been a FNB customer for years now and what i loved the most was the convinience of having to do everything online, quick and easy, but this month i was disappointed when i used the option to buy electricity and somewhere something went wrong within the FNB systems and i didn't receive my electricity token/voucher number, so i called in and the lady i spoke to admitted that there was a problem with the system and gave me a voucher number that was the FBE voucher number (Free basic electricity, when you buy el