Frustrated

The worst, when it comes to cancellation it’s so hard yet they keep taking money month after month. I canceled before the 20th of this month and they still billed me for September. Now they finally called me back “to process the cancellation” and guess what? They say I’m still liable for October’s payment even though I have canceled in September.. please make it make sense. I am beyond frustrated because I have explained my times I can no longer afford R555. Customer service is 0 and it feels like they’re ****ming me.