Win Expired Beer with Castle Lite

I registered for the Castle Lite Hotazhel promotion. To my surprise, a week later I had actually won a 250ml 6-pack. I'd never won anything in my life so you can imagine my excitement. I went to collect my prize, was told where to find it in the fridge at my local checkers liquor store. I got home and opened the 6-pack to sanitize the bottles before placing in the fride and the expiry date was 20th September 2020