Why pay for Fibre and ADSL if Telkom have no Fibre in an area?????

How do you sort out your account if you moved from an area with fibre to an area without? I went to the Telkom office and explain to them and they suggested adsl. Since January 2018 after I filled in the forms to change from Fibre to Adsl, they still bill me for both. I have about 17 reference numbers as well as a name, been on the phone for hours and hours, but they do not understand why they must credit my account. I had to cancel the fibre a month prior, but it is not a cancellation, it is a mere transfer from fibre to adsl because they cannot supply fibre in the area I moved to in Januarie 2, 2018. Now I have to pay for Fibre and ADSL!!!