My family are being awful to me for no reason

I never did anything to my family, my grandmother left me some money before she died, my mother took it and she stopped me going to the funeral too, she got my son in her care by saying I was a drunk drugged up prostitute, which I'm not, she said I was an unfit mother I was a nurse at the time, she and my sister and my brother in law have posted stuff online about me which isn't true, my sister married my mother's solicitor so if I see a solicitor it gets thrown out, my mother and father have phoned me to say police arrested me because I got some boys from my sons school to phone my son and threaten him and I paid them to do it and I was arrested for 2 days and not to see my son ever again, this is not true, my mother took my money from the bank £5000 which I was to have when I was 30 but given it to my sister they have got my son to call her mummy and my dad daddy, I'm not even allowed to call him on the phone, I haven't had a Christmas card from them in 15 years, last one I sent got sent back to me with F' off written across it, I have called my son's school to see how he is doing but I get told his grandparents have been told not to give me any information.