INCORRECTLY CHARGED - PARTIALLY REFUNDED

ON 6/12/2015 I PURCHASED QUITE A LOT OF COFFEE FROM NESPRESSO HYDE PARK AND WAS INFORMED THAT BECAUSE OF MY SIZE PURCHASE I QUALIFIED FOR CAPPUCCINO CUPS FREE OF CHARGE. I THANKED THEM AND PAID BUT DID NOT NOTICE THAT I WAS ACTUALLY CHARGED FOR THIS FREEBIE (R300-00 PLUS R42-00 VAT). THEY CONTACTED ME WITHIN THE HOUR AND INFORMED ME OF THE MISTAKE. I SENT THEM MY BANKING DETAILS FOR THE REFUND BUT HAD TO FOLLOW IT UP BEFORE A REFUND WAS MADE TO ME A MONTH LATER, R42-00 SHORT. I CONTACTED MS. CHARMISHA VALJEE WHO INFORMED ME THAT THE PRICE WAS R300-00 INCLUSIVE OF VAT. I DID NOT AGREE AND FORTHWITH FORWARDED THE TILLSLIP TO HER PROVING THAT IT WAS R300-00 PLUS R42-00 VAT. I HAVE SINCE JUST BEEN IGNORED, NO REFUND AND NO COMMUNICATION. I SENT MS. DHARMISHA VALJEE AN E-MAIL INFORMING HER THAT IF I DO NOT GET THE VAT REFUNDED, I WILL TAKE THE MATTER FURTHER, BUT AGAIN NO COMMUNICATION. NESPRESSO IS SUCH A FANTASTIC PRODUCT AND DOES NOT DESERVE TO HAVE ITS NAME TARNISHED BY BAD PUBLICITY DUE TO EMPLOYEES NOT DOING THEIR JOBS. PLEASE HELP