Rotten meat from Pick and Pay Hatfield

Pick and pay Hatfield, bought a pack of prepacked ribs and some breads..put the ribs in the deep freeze and tried having them on the the 14th, supposedly the sell by date, the meat was stinking and had pungent rotten smell. Shocking, imagine trying to make dinner only to find out l must make another plan. Utterly disgusted to have this from a supposedly reputable establishment.