Cancelled service but still being billed

During July I signed up for LTE via my service provider MWEB. MWEB was managing my Telkom ADSL and cancelled it with Telkom on 11/07/2017 which was confirmed by MWEB telephonically. I also submitted a service cancellation form at Greenstone store on 22/08/2017. This was for cancellation of my landline altogether. I received yet another account from Telkom for outstanding 702.30 and their response is that they only received cancellation of ADSL on 16/11/2017. For a Telecommunications company they communicate very poorly. There are no contact numbers on the printed accounts to query anything and the paper based system of cancellation is useless because you are not informed of any progress. And they keep on billing you...