Not impressed Telkom

I have 2 months left on my contract which I intend cancelling on expiry. Telkom upgraded me from ADSL to LTE and state that its an additional 24month contract. It was not requested by me. Now I am without service since 21/11/2019 as I refuse to use the new LTE router supp**** by telkom. My current ADSL router does not work. I have phoned telkom more than once. One consultant stated that a downgrade down back to ADSL will be done. I am still waiting