NO REFUND SINCE DECEMBER!

I booked flights to Cape Town during December 2015 with Mango Airlines and used my SAA Voyager Miles in part payment of the price. I had been trying to book for a number of days using my VM however Mango was currently experiencing problems with their \system\" and there were a number of failed attempts at booking with my VM meaning that the miles were taken,no ticket was booked & miles then credited back into Voyager account. On 15 Dec, Mango utilised my VM without allocating the miles to a flight booking. My balance was at 0 after this. Emailed & called Mango on 15 Dec who confirmed they were having system problems & directed me to Refunds. Since 15 Dec I have not received my refund of 5000 miles. Have spoken to SAA who confirmed that the VM were used by Mango & miles are currently waiting to be allocated to a flight booking by Mango. I have provided a statement from SAA Voyager to Mango showing them that there has been no refund of my VM but they insist the credit happened. My VM will expire in March & I will lose out on using them totally should Mango not WAKE UP!!Have been speaking to Chantel who just acts as a post box between me & their \"DevOps\" - nothing has been achieved!"