In my experience, a good hotline/call-responder can be adept at giving you temporary comfort when you're emotionally in a really bad spot.
This can, for example, be helpful if you are prone to self-damaging behavior during such spots.
They might even teach you a coping mechanism you find useful.
This can help you get through a rough day, but it won't solve root issues or change the make-up of your life that makes you feel this way.
Though they may be able to refer you to services in your area, depends, and these could potentially assist you in making those kinds of changes.