My Nephew

Hi Guys,

I'm hoping someone can give me some advice? My Nephew is nearly three, speach delayed, stims, hand flapping and arm straightening, he doesn't respond to his name, stares blankly at me when his Mum opens the door and then looks to the floor, he repeates words over and over, has eaten mud, chalk and play doe, isn't affectionate, has meltdowns, has smashed four tv's. I take him to the soft play/ball park every week which he loves and he does play with other children and screams with delight. I love him so much and I am desperately worried about him. His Mum and Grandma both refuse point blank to acknowledge there are any issues and I am worried he should be getting the help and support he needs. Any ideas on what I can do to help him would be really appreciated.