Telkom we require our refund of R2600.00 for debiting us after termination of contract !!!!! This is theft

As a loyal customer of Telkom, my business partner and I are left extremely disappointed in Telkom's customer service and continuing to debit our account even after cancellation. I went into the branch in PMB, they advised me in order to cancel a Telkom business line, I need to email all documents to ***. This was done on the 28/05/2019, we were debited on the 30/06/2019 which is expected as its a one month termination. We were once again debited at the end of July, whereby I re-forwarded my email asking for immediate attention. On the 06/08/2019 I received an email from Xolani Lephotho, who apologized and advised our contract has been terminated on the 06/08/2019 and blamed us for using the line which we did not. We get debited again at the end of Aug 2019, two months after our termination. I emailed telkom business and Xolani on the 03/09/2019 for a refund form to complete which has been ignored to date!!!! Telkom we want our refund for 2 months which equals R2600.00!!!!!! We a small business and cant be ****** of our money from such a huge company.