CHARGED FOR FREE DELIVERY

I HAVE COMPLAINED NUMEROUS TIMES TO DION WIRED ABOUT A DELIVERY CHARGE THAT WAS CHARGED WHICH ACTUALLY WAS SUPPOSED TO BE A FREE DELIVERY AS WAS PROMOTED BY DION. I HAVE SPOKE TO GARETH WHOM ASSURED ME THAT HE WILL TAKE IT UP WITH MICHAEL MOMBERG AND GET BACK TO ME ,WHICH HE DID NOT, I HAVE TRIED IN VAIN TO CONTACT GARETH, LEFT NUMEROUS MESSAGES WITH BONIWE FOR HIM TO CALL ME BACK, HE DID NOT. FINALLY I GOT HOLD OF MICHAEL , HE TOLD ME HE CANNOT REFUND ME THE R350 FOR DELIVERY CHARGES AS IT WASTOO LATE TO CLAIM BACK FROM RCS. I PURCHASED THE FRIDGE IN SEPTEMBER 2014. WHY SHOULD I PAY FOR SOMETHING WHICH DUE TO THE INEFFICIENCY OF YOUR STAFF THAT CHARGED ME FOR SOMETHING WHICH I WAS NOT SUPPOSED TO PAY. I HAVE COMPLAINED TO PERCY, HE DID NOTHING, FINALLY HE RESIGNED, I HAVE SPOKEN TO RAKHEE PERSONALLY, SHE LOOKED AT MY INVOICE AND SAID \THEY GAVE YOU A CREDIT OF R380