*****ing Money

I had bad service with my adsl for the last 2 years from Telkom so i canceled my service from them 3 or more months ago but they keep on deducting money from my bank account 3 months later now i have called them they says now i have a line for some reason that is suddenly active. and the one that is canceled where did that come from suddenly. Did they just add an active line so that i must pay because i did not aurthorize it.