Telkom makes it near impossible to cancel land-line subscripiton

I am furious that a business like Telkom is making it almost impossible to cancel the subscription. I had originally signed up for a line to have the ADSL. For more than 2 years, i've been paying for the service I am not using. I've canceled ADSL but have been unable to disconnect the Line (it was not possible to cancel both ADSL and the Landline concurrently) I phoned (once last year and once earlier this year (29.1.2021) in an attempt to cancel and spoke to amiable and competent staff. Last year the consultant told me that this was not possible until the payment is made for the month, and then I should phone back. This year, I was told I needed to call during 9-17h00.

I tried registering on the site to attempt to navigate and do it there, in vain.

There is no email address to which I can send the notice.

I am not sure as to what to do.

Can someone advise.