RETAILER REFUSES TO EXCHANGE GOODS

A COUNTER SALES PERSON SOLD ME AN INCORRECT MULTI SWITCH ON 24/1/2015. MY HUSBAND WAS ONLY ABLE TO FIT ITEM ON 9/2/2015 TO FIND OUT IT IS INCORRECT. WHEN ATTEMPTING TO EXCHANGE ITEM TODAY HE WAS REFUSED DUE TO EXCHANGES ONLY VALID WITHIN 7 DAYS OF PURCHASE. MY HUSBAND INTENDED PURCHASING ADDITIONAL CABLING AND ITEMS FROM SUPPLIER BUT DUE TO THE BAD ATTITUDE OF SALES PERSON TELLING HIM HE HAD TO BUY ANOTHER MULTI SWITCH AT APPROXIMATELY R250 HE REFUSED TO SPEND ANOTHER CENT IN THIS STORE. SURELY THE CONSUMER PROTECTION ACT ALLOWS FOR ITEMS TO BE RETURNED FOR EXCHANGE WITHIN SIX MONTHS? REALLY POOR SERVICE AND LOST SALE.