Held captive in Telkom contract

I have been trying to cancel my month-to-month WiFi contract for the past week with no success. They have a link on their online platforms which has not been working for as long as I've been trying. Their call centre plays an automated message blaming loadshedding and cuts you off. The call back service does work, however the agent is unable to cancel the contract due to said cancellation link being down. HOW is one supposed to get out of a contract???????