Hello
Unfortunately you're not allowed to name living people in this forum. Edit your post and then do three posts and see if someone can help you via Private Message. Watch your emails to see if you get a reply.
Blaenau is an amazing communtiy where people care about their neighbours so there is a good chance you can get to the,m.
There are a few people localish to Blaenau Ffestiniog here, perhaps someone can point you in a right direction. I do not believe there is a local Salvation Army branch but there is a very active church. Here's a link to their website.
https://bromoelwyn.churchinwales.org.uk/ I have a friend who is local to the area and if you like I will contact them for you to see if they know them.
Nesta