Vodacom a *****

Vodacom is a ***** when it comes to airtime. Vodacom has been *****ing my airtime by open bing my number to subscriptions that am not even aware of, when I called them and enquire abt my airtime going missing they told me the are subscriptions linked to my airtime however they can disconnect my number from them and lock it from these subscriptions, my question is who open my number to them if they can block and lock my number from them clearly if they can do that they are the ones opening these subscriptions..