Unfair treatment by vodacom

If I didn't have to click on a rating I would not. I have been using the vodacom wifi for the past two years and every 3 months they would increase the debit order amount until recently when I wanted to part ways with them. I called them to give them a months notice as per the month-month contract I had with them. I told them they were to expensive 899 per month for a 56 bps wifi connection. They then promised to reduce the bandwith and installment but they never did and I had a debit order arrangement with them. They also did not deduct the monthly debit order and only disconnected the WIFI. they took my silence for granted. Now I get an sms about the vodacom arrears being handed over