My friend is in an abusive relationship

My friend has a very abusive boyfriend. afaik he doesn't hit her, but he's extremely manipulative, calls her names, controls her movement and even her job. they moved overseas a few years ago and since then he hasn't allowed her to have friends there, have a job she wants (manipulated her into working in his fledgling company which isn't doing great and into leaving a store where she was working to go wait tables at a restaurant where he and his friend work. She hates both and wants to be a graphic designer but he wants her to work there so she does). a few weeks ago he decided she was cheating on him, screamed at her for ages and kicked her out of the house. The lease is under his name only and she gives all her money to him. they were broken up for a few days during which he went out with other girls, ignored her and called her a whore if he ever talked to her. then she managed to talk to him and he took her back and she's sad now cos he says she's only with him so as not to be alone, and she's trying to think up ways to show him she loves him and i feel he's just manipulating her. she has no friends in her new country and i'm scared cos she disappears for a while every time they argue and then comes back talking about how she will work harder to show him she loves him.

Anyway.

I'm worried about her and don't know how to help -i tried telling her she deserves better but she avoids it completely and keeps talking about how she will do this and that to please him. what can i do?