Telkom cancellation of landline a joke

I have been trying to cancel the landline for my mother-in-law since May2018 since she no longer requires or deems it affordable. Chatted to the call centre and I was assured that all relevant documentation was received. Every month I receive a bill that is accumulating. After another hour on the linbe I have a vast array of references that are apparently the cancellation references. But lo and behold I get another bill for another month. This is really pure incompetence and getting rather annoying to say the least.

The references are as follows: ********** 37A ********** 97A ********** ********** 3

Would hope to hear from someone regarding this matter