Debit Card Refund taking a week

I bought a sewing machine form metro home center on the 25/04/2015. Unfortunately faulty and returned the machine on 26/04/2015. Upto today 3rd of May no refund was made to my accout. Supplier provided me with there bank statement and ref no of inquiry to their financial institution. The money in questions left financial institutions on the 26 of April 2015 and refund was done on my card same day. Money back to Capitec account that suppose to credit my accout.03 of may 2015 and no credit to my account done. Capitec claims they on the receiving end and of this transaction and i need to go back to metro and financial institution. After explaining to the manager that i have ref no (***) and bank statement confirming the same he will now after a week of following this query up from my side send to the investigation department and might take a nother 3 working days to give me a answer on what happend to my money. I'm in the upholstery business and without a machine my business is standing as it did now for a week and 4 more days after today. Capitec are the worst bank and feel nothing for their clients. Customer service is non existing.