Making mistakes and costumers needs to pay

<p>I upgraded my contract in December 2015 whereby I was given a My 1GB promo for 3 months. As time went on suddenly my account was debited more than normal, so called the call center and they informed me that they can’t find a mistake on the system I should go to shop I opened the contract. So, I went online to see if I can see the mistake and Vodacom starting charging me for the My 1GB promo, I went to the store and the person that assisted me said it was a mistake on their side it is rectified and I won’t be debited anymore, the next month the high premium went off again so I went back to the store and a lady assisted me and said she will send it on for further escalation, then I received a SMS that my account was credited with 2GB Data, I am like seriously, I have uncapped internet at home and work, if I wanted more Data I would have chosen a package that gave me more data, so I went back to the store and asked for the manager, he email someone as well and said it will be escalated and now again the high premium went off, so since March 2017 until July 2017 I am paying for a mistake that Vodacom made and seems no one can help.</p>