********** debit orders

I have been trying to get hold of Telkom for 4 days now, with no success. I detected a ********** debit order from my bank account, from Telkom on 15/5. I do not own a Telkom account, and I have been out of the country from 27/2, so I definitely have not authorised any new debit orders. I have contacted the bank, they are stopping the debit order (at my expense), but they insist that I initiated this debit order. I’ve been trying to contact Telkom via email, website, Facebook messenger and WhatsApp, asking for proof that I authorised this debit order. I have only gotten an auto-reply on Messenger saying that they don’t have any agents available to help me at this time. It’s interesting that they have enough agents available to **********ly authorise debit orders for products or services they have not sold to me. Next option for me is to open a case for *****.