Nedbank Pathetic Customer Service

I had purchased electricity on the 17th June. I have not received the voucher. I phoned customer services, they provided me a reference number, advised that the query has been resolved in 5 days. It is now July and the query has not been resolved as yet. Each time I phone I get the answer the bank is awaiting feedback from the municipality. Nedbank service is pathetic. I would like to close my account. I do not see the need to pay such high bank fees when we as clients have to beg for a query to be resolved. I want this query resolved so I can close my account!!!!