That sounds terrible. I always gutload my crickets for at least 3 hours before feeding, and they only get organic fruit and veg for gutloading.
Can I suggest maybe breeding blatta Lateralis (Turkistan roaches) they are about the size of crickets, (from nymphs to adults) don't make noise, can't climb slick surfaces, don't smell like ass the way crickets do, and have better meat to shell ratios. Your landlord would never know, I keep mine in the pantry in a sealed tall sterilite waste-bin. The nymphs are so teeny, they're about the size of Pinhead crix, and the adults are about the size of large crickets, only a little fatter in the body.
My Fire skink loves them and will not touch crickets, he actually spits crickets out and wipes his mouth, Lol.
If this is completely out of the question for you, perhaps ordering from Sunshine Mealworms would be an option, I have never had an issue with their crickets, and because they're fairly close to us, (on the west coast) cricket mortality rate is low in the shipping.
Just make sure to gutload any more crickets you have with organic foods, hopefully your sad situation was jut a fluke and won't happen again. Sorry that happened to you.
Help! Crested Geckos! 0.1.Leachie, 2.1.1 Gargs, 1.0 Chahoua, 2.1. Blue Tongue Skinks, 1.1. White Lined Geckos, 1.3. African Fat Tails, 2.2.0 Tokay Geckos, 1.0. Giant Day Gecko, 2 tarantulas