GAME STORES POTCHEFSTROOM - PATHETIC AND UNFAIR!

I bought an Alva heater on the 5th of July 2018, used it for about 8 weeks and boxed it because Spring broke. I opened the heater to use it again about a month ago, the electric bars have died. I returned it because it is well within it's one year warranty. I get there and they tell me they cannot exchange it because it is 1 month away from the end of its warranty. What is the point of having a warranty if it will be disputed.. I have a young child that is reliant on the heater on the mornings and evenings. I am totally disappointed. I am told I should wait for 21 days for repair feedback. And what do I do in the meantime?? A cold house and a child who is reliant on the heater.