You need to get some drainage medium in that soil. Perlite, pumice or expanded shale. I do almost 50% of my soil as one/ a combination of the three. Granted I live in a very humid area so you may need less depending on where you are. Succulents need a lot of drainage and air around their roots. They're also really etoliated, they need way more light.
You may be over watering too, it's hard to tell from the pic but the one that's slumped over is a sign. Press the leaves, they should be firm with only a little give. If they feel squishy, they're over watered. New soil should help but you should cut back on watering as well, especially while they're recovering from being transplanted. Once a week when they're growing and once a month when they're dormant will do you just fine. It's coming up on spring so they may start growing soon. Id recommend you put them in some better soil asap, that way they can build new roots and get to growing under better conditions. Best of luck!