My aunt is mentally challenged. She is middle-aged but with the mental age of a pre-teen. A few decades ago she was placed under legal guardianship of my uncle, her brother. She has a pension left by my late grandparents (her parents) and should be well off financially.

A few years ago her pension was cut off without explanation (at least to us). Since then, my uncle provides for her, but his whole family refer to her as a burden and her health and situation really deteriorated. 

I found out a couple of weeks ago that the reason her pension was cut off was because my uncle has repeatedly ignored court summons and judge orders to provide accountability of her possessions and expenses. The court couldn’t establish If she was alive or not, so they withheld all her funds until someone comes forward.

I asked my mother (their sister) for a POA so I could represent her as an interested party and try to reestablish some normalcy in my aunts life. Since then I’ve been relentlessly attacked by my uncle, who claims I’m stirring things up, breaking up the family, destroying everyone’s life’s by involving the courts, etc

He said that if she is taken of his guardianship and into the state services it will be my fault. That everything will be my fault.

I don’t want to cause trouble to anyone. I just want to help my aunt, as she cannot do anything by herself.

AITA?