Telkom owes me money!

This post is now being done because clearly no one at telkom is able to help me! I was debited R600 more than 2 months ago. This was an incorrect debit. I had cancelled with telkom and this debit went off after I cancelled. The first time I called, an agent told me that it was a mistake and that I will be refunded. The 2nd time, I was told that an enquiry needs to be opened which will take 21 days. The 3rd time I check, another enquiry needs to be opened which will take another 21 days. I follow up today which is long passed 21 days and I get told that my enquiry is still still open and it will be escalated. Which will take another 21 days! Who do I speak to to get help and my money back?!