Iam 73 years old, and lost my 49 year old brother to cancer in April 2022. it came as a great shock to the family as he only took sick in December 2021, and was diagnosed with cancer shortly afterwards. At first they thought an operation would cure him, but it eventually became apparent that they couldn’t, we were told he had terminal cancer early March 2022. 
Most of the  family contributed to nursing him at home with the help of District Nurses and the hospice at home service, before he was admitted to a hospice, 5 days before he died in April. 
We all struggled with his loss, but his now 13 year old son just can’t move on, he is devastated. He won’t go to school or out at all to be honest to see friends or anything social, including family get togethers. His temperament has changed from a happy young lad to a confused, angry helpless young boy. We have tried to get help for him but to no avail, the doctor says not to worry he will grow out of it. He had not been referred to any agency. 
The family are at our wits end, does anyone have any suggestions as to how we can get help for our boy.