Reversal of products bill I have not have agree with.

I'm so disappointed with Mtn service really , I have Mtn contract with them for more than 3 years and was happy with the services up until one day someone wanted to hack my Mtn account, I called Mtn and alert them about it where the told me they have fixed it and blocked the number that I was called with. I have 2 Mtn SIMs were the contact is for data and the other one for my daily use that person opened Mtn app without my concern so when I raised it with Mtn I was told to open Mtn app for myself so I can control my account so I did everything was fine up until around April where my bill changed from paying R240 to R560 I called Mtn to ask them what was happening on my account the told me I activated Contant even I told them why would I do that and complain about it then the guy told me to dial *155# to cancel that subscription I did I told them to reverse the money ad I do not have knowledge of it but they never did . The following month it was still like that I contacted them with no help they told me it's canceled but the bill was not reversed. Month may or June my spending limit was increased without my concern I went to mtn outlet for help and indeed it was increased and was helped to decrease it but already billed in my account. I received my statement breaking everything down for me where I some someone was playing a game on that contant event and checked what's trending and it charges me everytime I asked mtn consultant.t to check that game and the told me they can't see anything of sort I showed them the statement but on the their screen the couldn't see. I called customer service a bout it I was helped by noxolo who was very rude and didn't want to understand my query at all insisting on that I increased my spending limit and activated content event a d we argued about it where I asked her to reverse that money as I'm not going to pay because I haven't subscribed for anything nor increase my limit. I asked her why would I do that as I'm not working and I know I'm not gonna be able to pay it, she told me that it was given like that. I felt so confused and horrible cause I know I did t do that. Please I'm asking for those bills to be reversed as this account helps me alot especially since I'm not working a d helps out with my children homework and myself also. I feel mtn is ****ming me on my account and the don't want to take accountability. This is horrible indeed . Please assist me with this matter