Can you get a job with a temporary agency and go to a variety of jobs so you can see what sort of work you might like better? I worked in a job like yours when I was at Sears in customer service, my first year out of college. I was in a basement and had to be at work before it was light out and left when it was dark, etc. and felt trapped like that. You have to get out of that environment; think of somewhere to go for lunch at least, a nearby library, somewhere else, your senses are under stimulated and that's not good in any event. I had to call people and tell them what they'd bought would not be delivered, was out of stock and got cussed at, etc., very stressful. See if you can find a regular phone answering job instead of having to call others who don't want to hear from you.