Rotten Chicken Sold at SPAR Bayswater

I bought Shaved chicken and it was past its expiry date by nearly two weeks. I never check expiry dates as i have trusted SPAR in the past. Opened the container and we nearly vomited from the smell of putrefied meat. Did not expect this from SPAR as this could have made someone seriously ill. Please sort this out before someone ends up in hospital.