Expired products and bad service

Yesterday there was a Tropica special where it was R100 for 2x10 which I bought. To my surprise when I got home the goods had expired and there was mold inside the juice. Firstly I don't understand why expired products are being sold. Secondly I sent and email info@devland.co.za and no has bothered to respond. I tried to call their office number and no one picks up.

All I want is a refund, what am I going to do with 20 expired tropica juices