Three shops in Greenstone Mall - not one can assist with contract cancellation

I have a Vodacom Data contract / sim card, which has been due for upgrade for perhaps 8 months (yes, I was also surprised since I have never received communication from Vodacom).

Due to the fact that my data bundle of 5GB is depleted within 20 minutes of online banking, I have decided to save money and cancel my contract with Vodacom.

I visit Greenstone Mall, which is flooded with Vodacom outlets. The first shop refers me to the next shop, because"we don't do contracts." Valid. I walk to the next shop, that refers me to the last saying "we cannot help you." Okay. I enter the last shop to which I am dismissed with the following words:

"Vodacom does not allow cancellation in person - you have to phone them." I ask what happens when you don't have a phone because it was ******. I get a shrug of shoulders. I state that I want documented proof on e-mail that my contract is being cancelled and that I won't be debited again, to which the employee stares at me and makes a sound as though she is trying to remove something stuck in her teeth. "Go to hmmmmm..... *shouts to colleague across shop "zo funa go cancel contract" or something similar in Zulu*)" after some shouting I get told to go to Bedfordview, who apparently specialises in cancellations. And here I was thinking that you cannot cancel contracts in the shop.

I ask for the number to phone and get told to look for it on the website.

Can someone online assist me with better service? Perhaps AI?