Please Help Me Overcome this Dead-end Job

I am trapped in a dead-end job that, unfortunately, is also a toxic work environment and it is wreaking havoc on my health and my life. I have tried to leave on many occasions, stifled in my attempts by coming face to face with emotional blackmail and slander from my boss and superiors; completely undermining my reputation to the point of contemplating suicide. I am miserable.

I have tried to quit many times but am just accosted and harassed by my superiors and my boss. I have poured so much energy and money into trying to build my professional skillset so I can leave... I must find a way to go back to school and get out of the field I am in.

I don't belong here and I have been losing hope. I just need a 6-month financial cushion of my regular paycheck to cover bills and food cost to change my direction in my life and really This is my last resort.