Premium deducted despite cancellation

I nitified rain that i wanted to cancel my subscription with them. On Twitter they acknowledged my request but unfortunately my premium had already went through I've been asking them when are they going to reimburse me as i was only using their sim card. They are ignoring me flat. My agreement with them was i could cancel at any time however they are not sticking to that R499 is alot of money. After months of struggling with signal in my area they themselves advised that they could not assist me and advised i could seek another service provider. I have found a better service provider . I want out and they are holding me hostage. I WANT MY MONEY RAIN