Lax service or plain *****?

I paid an amount to Telkom. R2282.70. This was in error on 29 July 2022. The debit order goes through every month and still has been deducted. I have tried to get the money back from Telkom but my email on 2 Srpt has to date not been responded to. I have tried sms what's app, have been twice to the store at Cresta and again to a store at Clearwater Mall where I spoke to and got the email address of a man who promised to attend to the matter and claimed they could not find the payment. He asked me to send proof of payment and I did on 2 Sept. How do I get this money back????