Over18 months and land line still not disconected

Last year Feb I wanted to disconnect my landline but unable to do so through my online profile, went to the Watercrest telkom shop for assistance. After many, many visits and emails over four months I get given a Request to discontinue form. I asked why I wasn't given this in the beginning, only to get a blank confused look as an answer. Filled it out then and there, thinking maybe one more month to pay and finally this will be sorted. WRONG...I received a call yesterday( over a year later)from some debt collection agency telling me I have been handed over by Telkom and my service has been suspended. The best part is that Telkom sent no invoices or letter of demand. When I phoned the call center I was told to cancel my line via my online profile. back to square one. Telkom takes bad service to an unheard of level.