Advice please. Family related.

Since Jan 2015 ive been admitted to hospital twice with complex PTSD from different forms of childhood abuse, lost my baby at 9 weeks in November and my mother has seen me as an inconvenience and she is full of excuses as to why she cant be around or support me in any way. Shes always busy. I even told her i dont want to sit and cry or even talk about anything, your presence alone is enough for me. She drives past my home atleast twice a day and i live 8 minutes away. Shes now running around telling people i have severe bipolar and wont take my meds and stopped me seeing my sisters that i was VERY involved with since they were born as she hasnt got a maternal bone in her body and always screams and curses at them so i co-raised them. Nightfeeds, in my care hours on end, sterilising bottles, making bottles, doing laundry, cooking every single night. Them kids are like my own and i hide every ounce of sadness i have. They came to the hospital to see me in the play area, i told them i had a tummy bug, denied heavy meds, bathed and put my make up on and had fun with them on the floor, laughing and joking. They arent exposed to ANYTHING. My mothers partner is an arrogant abusive narcissist that cant stand me and makes me flinch for fun and theyre pretending social services are involved when i have went myself and faced them and there is NO record of the kids names or addresses on all three systems in all their lives!! Now i have people asking me why I was in hospital and not her. She has severe issues, she was molested by two different men, held captive by my father for 4 years and raped and beaten and furniture thrown on her and he tried to teach me to slit my wrists. Im getting help for mine, im in therapy and doing brilliant, she has NEVER got any help for her issues and as a result her children have suffered. So shes telling me now "i cant be your mother because you dont act like my daughter". I used to draw pictures as a young child of her, my step father and their eldest together in their family circle and nowhere was i seen. Its like a wild goose chase and i beg her for her love and she doesnt want to know me it breaks my heart i really need her. How am i not acting like her daughter? I havent done anything but need her desperately in these hard times and shes left me high and dry. I held in my abuse for years from my father AND her partner all for her happiness because i witnessed what my father inflicted on her and tried to dive in to help as a 3 year old. I still remember clear as day. Ive bottled in everything and took on her children. I dont understand what she wants from me to be able to be accepted as her daughter.