Customer care at Cell C so poor they can’t even close my account

I became fed up with poor and inconvenient customer service at Cell C and wanted to close my accounts. I went to the v&a branch and was told that they can’t do cancellations in the branch and have to call customer service which I did in the branch. The answering machine said the cancellation department was closed. The manager gave me an email address for customer service. I emailed and expressed I no longer want to use the service and in response Cell C customer care said they can’t cancel my accounts.