*****ing my/your airtime without my/your knowledge

I have been using Vodacom SIM for over 10 years recently I noticed that my airtime goes missing. I got a usage statement which reflects that Vodacom has been taking my airtime for data bundles when I have another provider SIM which I use as data. This is a bad ethical conduct by Vodacom, they load people's numbers on their system to access the airtime even when u accessing social media through your home WiFi. Please make sure your data out of bundle limit is on R0 this is ***** to me bcoz u cannot take more than R30 from my airtime everyday bcoz I am not aware. Vodacom u r desperately trying to make money out of your customers *********ly, and it's absurd.