Bad attitude

Builders warehouse Gezina I was returning a generator that wasn't working for a refund, but the lady that assisted me had the worst attitude ever, she really doesn't have to be helping with returns with the attitude she has. I want my money back so I can get a working generator, they told me its going for repairs only next year, so what must I do between now and January? I am not happy with their terms, that you only get on return.