African Bank Call Centre Harassment

My wife pays her account every month without fail but the call centre phones and asks the same questions every month when are you paying and how much are you paying, your ID number and address and email address . This bank will not give you an account number to do internet banking and they only want debit orders and they will phone even when you have paid. And if they can't get hold of you they will carry on calling the whole day until they do so. This harassment is totally unacceptable and I would advise the people to avoid dealing with this unprofessional and *********** bank.