South African Breweries Hansa Pilsener

Good day SAB I am very disappointed lately, because every now and than I have to pour a beer of Hansa pilsener down the drain!? I drink my beer out of a glass and when I see it is slightly darker then I know..... and then I taste it and then I know for sure, Out of a six pack I am getting this randomly, one beer that is "off"?? tasting horrible and darker colour. although the expiry date is okay and show "BB 04 FEB 2021" ???? Before this country experienced a lockdown I have never experience this issue. I bought beer from Picardi in Hout Bay when I experienced it for the first time. Then I stopped buying from Picardi and bought from Pick n Pay Hout Bay, and today I experienced the very same thing, which was one beer in the six pack that was off. I drink beer every day of my life, at least between 6 and 12 beers per day EVERY DAY. I always buy per case of beer every 3rd day of my live. But now I have to pour beer down the drain because its off!!!!!!!!!!!!!!!! STOP WAISTING MY MONEY!!!!!!! If your beer supply got VROT due to the lockdown, claim it back from your ANC government!!! and not from the CONSUMER!!!! I will also log a complaint with the Consumer board and Ombudsman because this Vrot beer is totally not acceptable. We are all going through difficult times and more to come..... Please advise me regarding this ongoing problem of vrot rotten beer issue. As I have mentioned that I do drink Hansa every day of my live and therefore I can tell that I do get a beer randomly out of a six pack that is of. I will also seek advice at the relevant stores tomorrow from where I bought my beer with the receipts that I have learned to keep because of this "new normal" issue!!!!!!