REFUND

I BOUGHT DOG FOOD ABOUT 3 WEEKS AGO. DOING FOLLOW UPS IM TOLD MY PARCEL IS LOST THEY WILL REFUND ME. BUT THE MONEY THEY REFUNDED IS NOT THE MONEY I PAID. I PAID R514 AND I WAS REFUNDED R439 WHERE IS THE REST, WHY DO I HAVE TO PAY BECAUSE IM NOT AT FAULT