Poor customer service at Game Groblersdal!!!

I bought a portable power station at game Groblersdal 4 months ago. To my Suprise the charger almost set my house on fire. So the charger burnt and is no longer functioning. I took it back to the store and was advised that a charger is considered an accessory and is only under warrantee for 6 months. But they don't stock replacement chargers so they can't help me!!!!! I AM BEYOND ****sed. How can I pay the full price for half of the product to function!!!!!