MANGO POOR SERVICE

I booked a flight on the 4th Oct and dubbel paid when the SID said it was unsuccessful however it then processed twice. I have been trying since then for them to refund me and send them all relevant documents I am still waiting for them to refund me. Followed up on the 17th Oct due to no response. They then rep**** and said been approved I need to submit bank statement although this was done on 4th. Then on the 19th rep**** again and asked for proof of payment again. On the 24th I followed up again and got no responsed. Then I send a email to guest care on the 29th Oct they then rep**** saying the busy investigating. On the 30th Oct they asked for banking details ie copy of bank statement again and copy of my ID that was not needed before. And yet up today nothing.... It is only R465. 94 really it can not take this long and requesting the same documentation over and over.... When you request to speak to a manager they say they don't have any managers??