Telkom Billing for stopped account

I send in requests to cancel my telkom adsl and landline on 13 December 2017. I've received a follow-up phone call on the 15th of December, on which I confirmed my service cancellation. 4mbs uncapped adsl line bundled with landline. On 13 January 2018 I received a text message to confirm service cancellation (services were also cut-off at my home), reference number ********** 70. I've ensured that I pay my outstanding bill for 11 December to 12 January 2018.

Yet once I've checked my billing, I see that the services was not stopped at all and I'm still being billed for the 4mbs uncapped bundled adsl. Closer look at the invoice reveals its for 12 January to 12 February, which is absurd, I cancelled the service!

I logged disputes twice, reference ********** 1 and ********** 3, however, no-one have contacted me, nor have the account been correctly credited and I was told to pay the money.