Broken Chainsaw after a single use

I bought a chain saw at game which was broken immediately after wards without falling. After just one use it couldn't work any more and has a two year garantee. Upon taking it to game for repairs and getting an attitude from the consult it was taken for assessment and came back as it was before. I'd like a refund for a chainsaw that was garanteed to last me for two years. I'm tired of speaking to the store as my complaints are clearly falling on deaf ears. I don't want any negotiation or talks just my money back. Thanks