Delay in refunding client

Mango airlines were asked to do a refund on the 23rd February 2015. Since then I have called the refunds center numerous time inquiring as to when the refund will happen. Each time there is a delay. I've been told that there is a backlog in refund payments and each time to expect payment soon and today (07-04-2015) when I called to inquire again about the refund after been told to expect payment by last week Thursday (02-04-2015) I was told that the document were sent then sent back and are now been resubmitted and to expect the refund to come through in another two weeks time. <br> <br> This is delayed, unacceptable client service from Mango Airlines.