Discovery Bank I need Email contact details urgent

Is there a email contact for Discovery Bank, as dealing with their call centre is infuriating, they want all your details, even before hearing what the problem is, my acc was changed from Credit Card to Discovery Bank current acc without me requesting this, I am trying to cancel the Discovery miles charge - also not requested by me to be reversed - to no avail...now have to pay this before i can close the account. Call centre staff very unhelpful, no care attitude, promptly cuts off your call - then you have to call again.....worst bank ever, worst call centre ever, worst service ever...