Nedbank delays credit card refund to FNB card

I was refunded on my FNB credit card to the amount of R15600, on 15 March 2016, by A&R Furnisher King.<br> The refund trace no is 527059<br> Up to today (23 March 2016) no money from Nedbank was refund to my account.<br> FNB can not trace any refund to that amount.<br> Nedbank does not respond to my email queries to date.<br> Peter ( tel *** south africa ) from Nedbank complaints div, said I must sort it out with my bank.<br> This is a large amount and is costing me unfair interest.