Dodgy Pre Packed Meat

Bought half lamb pack for R693.93 yesterday afternoon (16h21). Opened it this evening to marinade for function tomorrow, meat is slimy and smelly. Very dissapointed 😢. Is this reason you guys no longer give customer option to choose a carcus and cut it up and pack it in front of customer and rather pre pack them instead? Who knows how long these pre packs stand in the fridge?