Taking contact with telkom was the worst decision ever....

I took Wi-Fi contract with telkom everything was fine up untill the last month of the contract were by i had to cancel the contract, telkom agent advised me that after canceling the contract i will still be able to connect via Wi-Fi but my closing balance would be R40, month end they didn't debit they R40 as promised by the agent, the following month i ended up being debited R245 but i didn't take it seriously because when i phoned their call center they said the R205 was a penalty fee. Mind you my contract has ended but i kept on being debited R205 every month and i would reverse those payments now I'm harassed by their debt collectors that I'm owing R1260.00?? From R40 closing balance to R1260, i wouldn't advise anyone to take a contract with telkom, day light *******. They call center agent even assured me that my account was paid up and closed, i was shocked to receive call from debt collectors telling me that im still owing telkom R1260, i will pay it because soon il be buying a house and i don't want anything that will destroy my good credit record, but telkom is nonsense i regret the day i took that contract, their service is terrible from call center agent to management.