friends drug addiction??

Katie
Hi all! So I've recently had a friend come to me and tell me his girlfriend and him have been struggling with heroin addictions for the past two years. His girlfriend left him and her mom for a 30 year old Russian guy Who is super controlling. My friend is getting clean but he's really worried about his girlfriend. I have a feeling she might be stuck with this guy because she texts me friend every now and then and said "I miss and love you" but then blocks his number before he can respond and never replies to him. Does anyone know what we can do about this? I've literally seen shows and movies about women who are stuck with their drug dealers And can't go back to their families. Any advice helps! I'd love to help my friend. Heroin is the devils drug. Thanks!