Standard Bank Refunds takes Forever and they just pass the buck

I purchased an item from Jaymees Midas in Roodepoort on the 26 of July. I was supp**** the incorrect part and returned it on Sunday 29 July. I requested a refund as they did not have the correct part. The refund was done using the Card Machine. I bank with FNB and the refund is supposed to go back into my FNB account which I paid with. After numerous phonecalls and not being assisted in any way to find out where my money is, this is my last resort to find out where my money is before approaching the Ombudsman. Not only can Standard Bank not tell me where my Refund / Money is, there are people *******ly debited my Standard Bank Account for the past 5 Months and Standard Bank say they cannot help. But besides that I need my Refund Urgently as I need to repair my vehicle which has been standing now for a week. When I call Midas they just say they cant do anything as the transaction is with the bank and they do not want to call the bank to find out. So I would like to know where is my money????? Its been almost 5 Days now and still no refund!