PATHETIC SERVICE ON ENQUIRY!

On 30 July I became aware of an invoice *** that was billed on my account. I did not arrange for this collection. I immediately sent an email to the call center to advise them. Since then I have been enquiring about this every second day. I keep on getting the same response - "we will revert back to you asap". Well, I have not received my credit, and the response today "What is it that you are enquiring about" REALLY ??!! I have been speaking with Monique Richardson, Alistair C, Charmaine Dafel, and a few others! How can this company not deal with ONE credit in 4 weeks time? This is *****, in my opinion, as I have paid for a collection that was not for my account. I need a positive outcome and response as a matter of urgency! Very disappointed that the company cannot deal with ONE query in 30 days!!!