DEBITED TWICE IN ERROR BY TELKOM AND CANNOT GET MY MONEY BACK OR GET ASSISTANCE

I've got a debit order for my fibre connection. Telkom deducted it twice on two different days end May and again beginning of June. I went it with prove with my bank account that the money was taken. I was told I that will be contacted, as it does not show on my statement and must be investigated. That was almost seven weeks back. When I phone in and tried to follow up, I am send from one phone number to another, unable to find human assistance. This is so frustrating, Seemingly the money they took from me is not to be found. This is so frustrating !!!! I suppose they want me to give up, and take the loss, but that is a lot of money for me and I can't do that. Really don't know the way forward on this one. Really Telkom???