Telkom is useless!!

In September 2018 I ordered an LTE service contract from Telkom. Upon delivery, I received two routers instead of one. I contacted Telkom and they indicated that it was an error on their side and they would send someone to collect the extra router. They further indicated that I will not be charged for the extra router that was delivered. However, since October 2018 no one has yet collected the device and they have been debiting my bank account for something I did not order. When I contact them, they tell me that they have sent my query to the relevant department. Each month I have to reverse the debit order as they still have not resolved the issue and it impacts on me financially. This recently resulted in my bank contacting me saying that my account was overdrawn. This is also affected my credit rating. I was contacted by Telkom saying that someone will collect the device on Friday 22 March 2019 and yet again no one collected it. I have called them numerous times to log a case and still nothing has been done. Now there is an amount of R 1673. 49 that I am still awaiting to be refunded to me and an amount of R 2789. 13 that has been in their collections department that they keep debiting me and that I have to keep reversing. I am paying for an extra service that I did not order and was told that the person who placed my order duplicated it by mistake. This is absolutely pathetic!!!