Refund issued - 2 weeks and still waiting

I booked an international flight online. I called the next day to change the billing from my one card to my latest credit card as it included travel insurance. i was assured by the call centre Agent Lavern that he can cancel the ticket, i can get refunded within 4 - 5 working days and I could rebook immediately. I did as instructed and booked the new flight (same amount - to Copenhagen). I received the refund notification on 21/09/2017 and called the call centre to find out when this will be refunded. They instructed me to wait till the Friday. On Friday Tsholo told me to wait till 28/08/2017. When it was still not showing i called again on the Tuesday, and Mphile informed me that it should be in my account before 31/08. This morning there was still no refund. I have spoken to the fourth call centre agent - who will once again find out today what date they actually did the transfer. Yes I realise that usually they have a 4-6 week refund period, but this was a confirmed refund as I immediately booked the ticket again. I have confirmed with them online that if the refund could not be done within that week that i would rather keep the current booking. They confirmed that it would be done within 4 - 5 working days.