Help!

I can no longer reach out to anyone because my family and my husband's family want nothing to do with my mother and sister as they watch them hurt me more and more. I love my mother and sister and have done things I regret but they were in the past and I have tried over and over to make up for my mistakes. I have said I am sorry so many times and have been living on their continually punishment for years now. It seems I can not do anything right and my mother and sister have now become a pact trying to twist everything I say to the point that they are calling me a liar and telling my husband they need to talk to him about my lies. My mother forgets what she has said and than hears what she wants to hear and immediately calls my sister and than my sister accuses me of lying when in reality it is my mother that is not giving the correct information. Presently it has gotten so bad that they are now yelling at me about things I never even realized they were angry about. My parents were immigrants and as a teenager, my life at home was bitterness, being disciplined by being hit often, etc. I would take on challenging jobs supervising teenagers during the summer for 6 weeks and than went away to college. I did this to get away from the strictness, beatings, screaming and yelling. I loved my parents but the life they were leading was not the life I wanted to lead. My sister chose to stay at home and than get married. I am finding out now that they resent me for that and my sister throws in my face that she was the one doing the laundry , etc......Yet, I was always there for holidays, etc and when they needed me. My family never really knew how to communicate their feelings so that never happened and now years later as the anger starts coming out they are throwing everything at me. Things I don't even remember. I am starting to hate them and am starting to get incredibly depressed. I have tried to talk to both of them but my sister states it is not her problem and my mother states it is my problem and talk to my sister. Bother my mother and sister have accused my husband and I of things we have never done. My mother asked my husband to be the executor of her will and turned around and told my sister we handed her the papers and told her to make my husband the executor. Of course my sister believes my mother and this has caused much strife between my sister and I. I do not want to listen to the name calling, etc anymore and have indicated to my sister that if she wants to fix this I am all for it and have tried and tried but if she does not want to fix this than I wish her well. She continues with the negative emails. My mother has chosen to continue with her bitterness, etc. and continues to be mean to me and my family. My sister I can say goodbye to but my mother , I just don't know what to do. She and my sister feed off each other and want to live in the past. My mother has forgotten everything I and my family have done for her. When my sister's mother and father in law were alive they wanted nothing to do with me, my mother and my father and hence I picked up the pieces for many year while 40 minutes away. I was calling my mother every day and now I hardly call due to the verbal abuse. I just don't know what to do. They are now accusing me of keeping my kids away from them. Three years ago I was diagnosed with breast cancer and had to have surgery and 6 weeks of radiation. My mother told my son I id not have cancer and was lying. To this day she still indicates I did not have cancer. She states "how could I if I was working, traveling with the family, etc......" My kids have a difficult time connecting with her though I continue reminding them it is their grandmother. My dad passed away about 20 years ago. I wait for your words of wisdom and thank you in advance