Struggling to cancel my contract with them

Hi. I needed to cancel my contract that is expiring on the 11th of February and called Vodacom on the 2nd of January 2018. I spoke to Thembele from Vodacom's cancellations (call ref# ********** ********** 1) and she advised that I can obtain a cancellation confirmation letter after the contract has expired on the 11th of February.

On the 12th of February I e-mailed Vodacom to get a cancellation letter and after following up I got a response from "Sibongile" that my contract isn't cancelled yet due to a system error.

Vodacom, note I gave you the notice required and will not be paying further for this contract!! I want it cancelled immediately and confirmation in writing that this has been done.

Just FYI, my other number is also due to expire in March which I will also cancel due to this pathetic service!

Dewalt