Cancellation not done by 2 agents

I have called and cancelled my subscription I have spoken to two different agents requesting to cancel it the second one just hung up on me ,how do I pay for something that I'm not using is it possible for the company to not see the usages on their site because I mean you can't keep on taking my bill high meanwhile the WiFi it's not been used,it doesn't make sense. When the agent sell the device it was said that it's not a contract it can be cancelled anytime but now it's a problem it's 2 months now not using rain but when I check my bill it's two months bill so please please I dnt need rain anymore stop it or cancel it and remove that bill because I'm not going to pay something that I was not using please.