Hi Mollie,
So sorry to read your sad story and feel your frustration and fear that your son won’t accept any help. Its really very tough for you and I’m sorry that you feel you have nowhere to turn to.
If you would like some support please contact us at The Icarus Trust as we are a charity that provides support for people dealing with a friend or family member’s addiction.
We have a team of experienced and trained people and you could be put in touch with one of them if you get in touch, and hopefully you would get some useful advice.
You can contact us on help@icarustrust.org or visit the website http://www.icarustrust.org
All the very best.