Cannot get rid of Private Number when i call out

<p>This problem has been like this for a year and i have visited three different shops (lost how many times in each).</p> <p> </p> <p>The issue is everytime i make an outbound call, it always shows up on the recipient's side as Unknown or Private number. This is nothing to do with my phone as each shop i went into checked this. Each shop said they would report this to Vodacom further but to date i have not received any call back. I need this private number stuff stopped please! Please contact me so i can pass on my number</p>