We broke up

We broke up after 3 years together and 2 years LDR. Reason is our future is uncertain and now she's threatening me of Sucde and k**l herself. She told me she'd commit it and write my name everywhere. I'm really trapped. Please help me what should I do? I'm in abroad and can't do anything.

What can be done in those cases?? Your help would be really appreciated. Thank you!