Expired Beer incorrectly labelled

<p>Hi. I bought a case of 440Ml dumpies from Checkers Liquor in Boardwalk,Richards Bay ,KZN on Tuesday 3rd August 2016. The case had an expiry date of 14th October 16, but more than half the beer was off ,(stale). This is the only beers I have drinking for the past four years. </p> <p>I had visitors over for a braai on Wednesday and we were disgusted with the beers. I have throw my store receipt but can get a bank mini statement to.prove my purchase. I am hoping to be able to get a swap or refund as I am not going to change beers type. </p>