Vodacom not answering me on giving out my personal

A company calling themselves Mondo [URL Removed] tel: *** phoned me on both my Vodacom numbers more then ten times. Telling me that they got all my info from Vodacom and that they offer to reduce my rates for Vodacom.<br> <br> I contacted Petro Heyneke and sent her an email. she did not even bother to answer me. After I phoned her again she promised to answer me and she said that she has a proper answer for me. After my third attempt to ask her for feedback because I am worried about a third party having my personal detail she wrote me an email telling me that she cannot help me because she is not in a position to help me, and that I need to contact the CEO's office to get help.