Feel bad

Ive been with my narc ex for 2 years, the last 6 months its been on and off, i stopped talking to him and left him alone but 2 days later, he called me from prison. He was arressted for dangerous driving and can potentially be deported back to the country where I live (UK) he has overstayed his visa in the USA. I picked up and told him i dont want to speak anymore, he insulted me, told me i can never leave him, told me if i move on he will show my new partner what type of girl i was, insulted my family and he cut the call. Ive now blocked him and wont be picking up any of his calls. However i feel so bad and i feel like i might end up picking his call again because of where he is. He said to me i should put his time of need in front of my own feelings and he doesnt care about how he's hurt me, i should be there for him because he's in prison. How do I heal from him and go no contact without feeling guilty?