I cancelled my Telkom account 16 December 2017 and Telkom keeps taking money from my account

On 16 December 2017 I went to Menlyn Mall in order to cancel my Telkom contract and Lesley assisted me (cancellation reference number ********** 96A). This meant that my contract should have stopped on 16 January 2018 and I was supposed to only pay a part of our January fee (since it was only for 16 days in January). Upon receiving our final statement, we saw that the Telkom was planning on taking the full amount (instead of only 16 days), so we logged a dispute on 18 January 2018 (dispute reference number ********** 5). Via telephone the dispute department said that they will correct it. However, on 5 February 2018 the full amount was taken. And today, I received another statement saying that Telkom was going to take another amount on 5 March 2018. Can you please assist in making sure my landline was cancelled and that the incorrect charges that I was billed for are reversed. Again, my contract should have ended 16 January 2018 and the latest bill shows that you are billing me until 11 February 2018. My account number is ********** 46277.