I have a contract with Telkom and their signal hasn't been working for over a year. They sent their technician to me who confirmed that their signal doesn't work. Now I have to pay R980 to get the contract cancelled. How can I pay to cancel something that

I have a contract with Telkom and their signal hasn't been working for over a year. They sent their technician to me who confirmed that their signal doesn't work. Now I have to pay R980 to get the contract cancelled. How can I pay to cancel something that doesn't work its not my fault their signal is not working.