Trying to cancel for almost two months

Good day So around the the 23 March 2022 , I went onto the rain app and selected to cancel my Rain Internet...Today I get a Bill indicating I have to pay R998.00...Now what I don't understand is WHY ? To top it off , the majority of the time I've had the router at it was as if I was on my 1st contract with Rain where the internet gets put off at 6 pm daily. This is because the error message I was so use to getting was "connect but no Internet". I have sent through cancelation requests a number of times and TO DATE NOBODY HAS CALLED ME REGARDING IT...instead I got a call to basically ask me how I am finding the "APPARENT SERVICE" I then informed the girl that I've requested cancellation in the month of March and still no feedback. The lady then confirms that she will send it to the cancelation department as a Urgent request. Again TO DATE - NO FEEDBACK. Now I would like to know...AM I GOING TO GET PAID FOR DOING SOMEONE JOB FOR THEM ? BECAUSE I AM SURE AS HELL NOT GOING TO BE RESPONSIBLE FOR A BILL OF ALMOST R1000.00 IF I WAS NOT THE ONE...NOT DOING THERE JOB. I think the sad part about it is I referred friends and family to you because I didn't have a problem with you when I was simply paying R250 a month. I was even warned about your services and I went against that advise because YOU where my service provider. Besides being angry and Frustrated I am more DISAPPIONTED.