chicken cutlet that had gone bad

i bought 2 packs of chicken portions from woolworths food at Fern Village in Ferndale that was marked down (30%) for that day on 05/11/2015. normally I buy these bargains and never have problems with their products. But this time around when I tried to roast the chicken in my air fryer, I smelt an offish smell from the chicken. The chicken was inedible. I am so disappointed with woolworths food. They take pride in their expensive overpriced products assuring the consumer of their freshness. Now my whole family and distinguished guests had a meatless supper thanx to Woolworths food :( Forget about the meatless supper, how about the embarrassment I had to experience because of a smelly kitchen infront of my guests.