This is a local service specific to the area where you live, and you should contact them for any issues with the email service. It's best this way because in case you've lost the email, the support team might help you get back that data. Since I don't have access to servers, it's pretty impossible for me to say exactly how to get it.
Use the following link to contact them: http://help.vodacom.co.za/personal/contactus/
