Breach of Confidentiality

• For many years I used the services of Vodacom (unfortunately this is no longer the case) • Today I have been advised that one of their employees (Mr Basil De Klerk) has accessed my account and passed my personal information onto a family member of his. • The family member provided my cell phone number to Vodacom's employee and he provided details of my account such as my address details and billing information. • This I find completely unacceptable as I signed my contact with Vodacom and provided my details to Vodacom only, this information was not to be used by Vodacom staff and given over to family members, who are now harassing me. • what action can be taken against the above mentioned employee.