Bad customer services

I called mtn because I keep getting subscriptions on my phone that I have never accepted so every weekend I have to remove those. I spoke to Jabulisile Masiya and she advised there is nothing that can be done. I was not happy as every weekend I keep getting them and I have to remove them so I asked her if she can do something so that I never get them but she did not understand what I was saying so I asked for a manager and she said there's no manager or second incharge on the floor! Im really dissatisfied with the customer experience... I mean how can mtn allow agents to work unsupervised and the agents are ***********.