********ly charging fees

On 10 April 2018 i did an online upgrade on my cellphone contract with Vodacom. When i received my monthly invoice on 10 May 2018 I noticed that i have been charged an upgrade fee, even though on their website it says that there is no fees for an online upgrade. This was taken up with vodacom on 11 May and the consultant could not explain to me why i have been charged the fee. This was then escalated and to date I have not received any feedback from vodacom. I find this unacceptable from vodacom as they take your money without any explanation and then when you try to get to the bottom of it you get no feedback from them, in essence they are lying to their customers about fees. This is also not the first time that i have an accounting issue with them when doing an online purchase, whether it is a new contract or upgrade.