It saddens me that someone can do something like that. A neighbor recently adopted a Carey that was dumped by her +10 years former family because they were going to live abroad. She is adapting herself, but still visibly affected.
About the pooping, maybe it is just a learning issue. When i rescued my tortie from the streets, she started pooping not randomly but inside (or pretty close if the door was closed) of my bathroom. I just took her to another room alone (she is pretty hyperactive, 3 mins was enough to get her bored). After the second time, she naver did it again, and now happily uses the sandbox.
Someone told me that cats dont understand reprimands but they surely understand being bored. I dont know if that is true, but it helped me.
Edit: cat tax. Gusfraba sleeping in the geometrical center of my bed, because she obviously needs all the spaceCattax