Baywest selling old stuff beware

So last week I did buy cheese at your store in baywest Port Elizabeth on the pack it says it expires on the 23rd of December it was in the refrigerator the wole time.today when we wanted to ues it we see its old this unacceptable this is not the frist time something like this happned last time I actually got food poisoning form eating a pie form this store now you guys are selling old cheese to how can it get old so fast and its in a refrigerator this is unacceptable form.pick and pay baywest pe