Humiliating Customer Service

On 9/11/15 bought 2 trays of lean minced meat with an expiry date of 11/11/15 at Game - Jabulani Mall , cooked them after just 10 minutes of date of purchase . To my surprise there was an unpleasant smell from the meat , figured out it was rotten . On 10/11/15 I contacted the store and spoke to a Mr Patrick Ntanzi who when told of my query , blatantly told me there is no way that meat bought on 9/11/15 expiring on 11/11/15 could be rotten - he basically told me am lying through my teeth . He even raised his voice at me and slammed down the phone - mind you , am a customer and the one who initiated a call(have the recording) . To game , is this the kind of customer service rendered to customers , is it fine to be disrespected and humiliated ? If yes , I will never buy from Game Stores ever again . Your Store wont close down because of me but would have lost a loyal customer who spends thousands of rands at your store , especially the Jabulani Branch .