Never seen such incompetence

My contract ends on the 12th September and I tried cancelling it with no success. I called Telkom on the 13th August and I spoke to an agent who was not helpful, she gave me a wrong reference number( ********** 45), I don't know why. Then on the 17th I log online and chat to another agent who told me that my contract hasn't been cancelled even after the first agent promised to cancel on my behalf. The agent told me that no one will cancel for me but I have to go online again to cancel. I tried again on the 18th again could not cancel and then on the 21st I went on Telkom Facebook page and send an inbox and again no response. I will pay my last instalment and close my account.