Unsuccessful cancelation

I have made numerous attempts to cancel my internet services since February. I've sent multiple emails and made numerous phone calls and only today received a response stating that I am liable for this account even though I've requested cancelation and they can see on their side that there is no usage whatsoever on this simcard. I am unemployed and thanks to rain they have pushed my account further and further into a minus every month because they just keep charging and taking money from my account. They need to credit my account and refund me my bank charges. What they are doing is *******. When I first signed up for their service the consultant actually told me it is a month to month service and if I can't pay that month it's fine the internet will just be suspended and when I pay again it will be reconnected. I didn't do that, I cancelled the service but rain is refusing to cancel. One of the consultants I spoke to actually confirmed that they have received my emails and that she would have my account credited in March and to date nothing has been done about this. Luckily I have an app on my phone that records all my calls so I do have records of all my calls and emails to rain