Dismal Service/ Over debited my account/Sent from pillar to post/ Absolutely annoyed!

I called Vodacom regarding an upgrade i made last year that was to come in effect this year. Firstly this upgrade came with data which i did not receive, however the airtime was loaded. I called in to enquire about this and was sent from pillar to post until i was told my account was in arrears. I quickly checked my banking app which clearly showed that my account was debited and to my horror more than the agreed upon price of contract. I spoke to the agent on the side and explained this, who in turn said he would transfer me to "Account Department", I was put on hold for a while then got disconnected.

Vodacom I am appalled at this behaviour, i want someone from the account department to call me at once and tell me why i was overcharged and what happened to my data. This is the reason people cancel contracts, you can not treat paying customers like this.

I want my phone call now please.