Abusive relationship with Vodacom

At this point being a customer for Vodacom feels like being in a toxic abusive relationship because wow somehow someway they will manage to make you spend your money on them for no particular reason and the customer service employees bless their souls because they will tell you that there is nothing they can do. Can someone tell me why I bought data with my airtime but was charged airtime advance and this always happens and no particular reason will be given. At this point cutting ties with Vodacom wouldn’t be a bad idea l