Failure to cancel my contract

Hi

I just recieved an Sms advising me of my bill for this month which is still R847. 09..i had requested a month ago to cancel the one contract which runs on a month to month for second time which clearly had not been done. My account # is as follows: ***. I had requested the cancelation and the lady in the line confirmed that I will not be paying for this going forward, the subscription and usage of ***.. Please can this be resolved and can I be refunded asap. This is not on and I am. Paying for something I am not using