I have emailed the Samaritans, it has taken more than a day for a reply, but it is useful if you can't phone. They will take you seriously. Not so good if you need urgent help. The advantage of writing is you can work out how to say what you want exactly right, rather than forgetting important things you want to say on the phone. It is a bit tedious waiting for a reply, if you are going to go back and forth several times though. Sometimes it is just easier to write.

Good luck.