Still waiting for my refund

The reference I got from the call center on Wednesday 8 April was ***4. I have also been to the Centurion store in December still requesting my refund and still nothing. I had cancelled my contract around August 2014 and since then my account has been in credit and I am asking for same to be refunded. The number starts with 061, and it was the 10GB promo for R199 per month (I currently have 3 existing accounts still).