Need assistance to Cancel Telkom Account

Cancelling Telkom is Impossible!!! Still being billed for a line I don't have!!! Been battling for 10 months to sort out our Telkom account... July 2019 - We were informed that Telkom will no longer be maintaining copper lines in our area. Our DSL line had to be replace with a Fibre line. Open Serve installed the fibre line and deactivated the DSL in August 2019. From August 2019 to end of November 2019 we were charged for both DSL and Fibre... I reported twice at the Customer Care in Hillcrest; and logged 3 billing enquiries on the 10210 Customer Call Centre during this time.

In October 2019 I managed to get a contact at Telkom Head Office. Mrs van Zyl did the necessary corrections and our account was credited. On 28 November 2019, I gave 1 month's cancellation notice to Telkom via 10210 as well as an email written to Telkom, as we were moving to a farm mid December 2019, and there was no Telkom coverage (Telkom Technical confirmed).

Much to my surprise when I received a statement in February 2020... Telkom was still billing me for the fibre line, which was cancelled and disconnected in December 2019. So, at the beginning of March 2020, I phoned Mrs van Zyl (Telkom) again. She had the charges reversed / credited and confirmed cancellation once again... This month (April 2020) I received yet another statement stating that I owe Telkom for 2 month's fibre rental... Also received an sms that they are going to take legal action if we don't pay... I haven't had a Telkom line since December 2019... I don't owe Telkom anything... I have email correspondence affirming the above... Can anyone senior in Telkom assist to sort this out, once and for all, or should I rather just contact ICASA, Complaints Board or the Ombudsman?