Electric blanket - broken 2 months after purchase

I bought an electric blanket in April 2014 and started using it in late May 2014 of which from July 2014 it stopped working on one side then I contacted Homechoice to inform them and they told me they will get back to me then NO CALL from electrical appliances department till i went abroad then on my return tried to follow up on the matter and they claiming that its past the 1 year guarantee. I do not understand cause i did report this last year immediately when I experienced problems then they didn't call me back so when I am trying to follow up they say they cant help me....how do i go on paying/owing an electric blanket that I am not using plus how can a R599 ELECTRIC BLANKET BREAK IN +/- 2 MONTHS AFTER USAGE, its not good quality or its a factory fault...I AM TOTALLY DISAPPOINTED IN HOMECHOICE, and I will never buy anything from them ever again.