Data on ADSL line not cancellled as requested

I went in Telkom store on 26 Sept 2015 to requested my data on ADSL line to be cancellled as off 1st Oct 2015, only to receive my bill electronically which states an amount of R820 higher than what I paid before!!<br> When calling 10210 this morning only to find out that the data has not been cancelled and that I've been charged pro-rata + new amount on ADSL line as I also upgraded the line to a 4mbps. Not once did the Consultant advise of the pro-rated amount nor the fact that even though I signed a request to cancel the data it still has not been cancelled and only to find out that my bill for next month will be R650?? How is this the case if I have written proof of my request to cancel the data from 1 Oct, why is Telkom still billing me more than what is required, why wasn't my written request adhered to? I will not be paying for something that was not requested. I need answers and the Ombudsman details.