Samaritans have a email that they respond to (jo@samaritans.org) - it might be easier to put down your thoughts in writing (and so control how much personal info you have to give out right away).

Whatever health trust/organization your care coordinator works for should be able to contact them & that organization's contact number should be available from directory inquiries on a public phone.

You're not alone in this - I suspect that many on this forum have been down the same road.