Unauthorized credit checks

I checked my credit report and Vodacom has made 2 enquires on my profile within 2 months. I have no dealings whatsoever with Vodacom and don't intend in having a cellphone contract with them. It's difficult to get hold of them using their customer care line, I spent almost 40 minutes and there's no option to speak to a human being. The chat bot is the worst I have ever come across.