Cancel phone line, phone dead still getting billed

I cancelled my phone line (landline) on 31 June 2015 via social media team (Facebook).<br> Notice peroid being 1 July - 31 July.<br> I was billed and paid for the 1 month cancellation period.<br> The phone stopped working 12 July +-2 weeks after requesting cancellation. Which I have no problem with.<br> Yet telkom is still billing me the monthly rental For August till October.<br> I cannot phone 10210 since my phone is not working anymore and not prepared to pay for that call via my cellphone.<br> <br> Telkom please fix.<br> I am not paying a single sent more. <br> <br>