There is an excellent charity that I know can support you – they have a remote family support group, and also provide free treatment for addicts struggling with addiction issues. To read more about them and receive the help please see link https://adaptoxford.org.uk/the-icarus-programme/
you can fill in the referral form on their website.
They also support addicts, and provide free rehab to them if they are ready for help, all the info is on their website!