reddish leathery leaves

[neophyte]

I got these tiny little dendrobium keikis so I was like, Yay!!! and then some mold started growing on the roots somehow, so I cut off the bad parts and stuck the plant in the fridge. Then I forgot it and like four days later, I got it out. The leaves were a teeny bit leathery. It's getting worse and worse and the leaves are starting to turn reddish.
Also I have another one(both D. kingianum) and they both don't have many leaves. The dying one has 3 and the healthy one 2. They don't really grow. ?