So to close your account:
1. Skip the rep and email as they do not provide any kind of response, phone them.
2. They will send you a case number and form to complete
3. The bank which allows you to open a bank account at a PnP kiosk requires a certified copy of your ID to close your account
4. ...well that's as far as I have gotten. Can tell you that you need to save the case reference number and phone them next financial year to get your tax certificates from them as they will not send it.
EDIT: not that FNB is any better, I have an "escalation" email from them over 5 days ago, nothing. Tyme's contact center is by far better than FNB's, that's for sure.