Appauling Service

I have been having an on-going fight with Mango about getting a refund from an airline ticket that I booked on the 31st of August, in which the payment went off my account but I did not get a flight booking. I have sent them every single supporting document they have asked for. The last response via e-mail I recieved was on the 9th of September. I have been phoning the refund department at least 3-4 times a week. The last phone call with Mango, I was told by the 5th of October I would be refunded. It is now the 6th of October and I have still not received the refund. I am horrified at Mango's poor customer service. The fault was not on my side and so I am angry that this matter has carried out for so long. Luckily I was able to book a ticket a few days after the 31st of August, I can only imagine the price increase of the flight ticket if I had left it to now.