Is OTHER wrong in the post ? POST : On mobile, apologies. (First post here)

    Important context: Me (13 F), my mother (57 F), my father (57 M) and my grandmother (77 F) don't clash well together. Me and dad (A) v.s my mother (T) and my grandmother (c). T all her married life has been a hoarder, but since I've been born it's gotten worse. She basically is a beggar (not choosing thankfully) she's always tried to get as much free as possible. And always get mad at me for no reason Ex: I was pronounced Anemic and she got really mad at me for 'not eating enough'. But that's besides the point, all I'm saying is that I have some bias but for good reason. Another thing is that ever since I was like two, I've hadn't had a bed to sleep in, hardly a bedroom. And I barely stay at my parents house 

Main story/point: 
   Well back last year T was in a car incident, we recently lost a car so she had to walk to work. When she was walking she was hit, then of course was hospitalized. During this time my dad and I though it'd be good to work on cleaning our house (not as bad as what's seen on TV but a year away from that stage). We told T about this and           she flipped. 
A year later and a mediocre clear house (October 2018):
    A and I have successfully have cleaned some of my room and I can access my closet. Though I still don't have enough clothes to wear, I'm still very thankful. No, I'm really thankful. Then I come back from C's and I went to my room to get ready for church and it has been completely filled up again with T's stuff, this enrages me. I walk across the Hall to T's room, "Why the heck is your stuff in MY room?" 
"What are you talking about?" she smuggly replies. 
"Your stuff's in my room...? Why?"
"Erm that's not your room, it's mine."
Mind you it's always been my room since I've been an infant. Enraged at this point I take all of the bags of American Girl  crap and put them in her room. 'Done.' I think, boy was I wrong. 
The next week:
More stuff, taken out. (Repeat for the next couple of weeks) 
I show up at C's house to stay for the school days. 
"Why do you keep moving your mother's things??" C exclaims when the topic rises. 
"Because she ruining my chance of sleeping in a bed...?"
"Well she needs the space for her things." (T has a master bed room, she has plenty of room.) Conversation continues, this was q couple of months ago I don't remember much. But AITA? 

P. S I still get yelled at by C for not letting T dirty my room. 


TDLR: Haven't had a bedroom since I was an infant, finally able to have one, then mother starts piling more crap in my room