How to deal with harassment

I am working in a govt job as a 4th class employee. Every official keeps taunting me every time that I don't listen to them because I'm a regular employee and they are on contract basis and blah blah! After getting tortured for 4 months I wrote to my reporting XEN and worthy MC Commissioner about every single instance that almost every person takes bribe from the poor people to get their work done. Most of the senior level officials who are close to XEN takes bribe and every person in the office knows about each other's weak points so no one questions anyone and the same I did write in the E-mail I sent to Commissioner but got no positive response. Since then my XEN warned me several times that he won't clear my probation period and every one else in the office keeps reminding me that I shouldn't write to Commissioner,I should apologize to my boss,I should admit my guilt. I actually want to kill myself or put all the offenders in jail because they all are RISHWATKHORs and I can prove.