right to sue fromm eeoc under vii

i have just got my letter to sue from eeoc and i think i have several issues sexual discrimination to a male by male supervisor ie pinching pulling of arm hair, on job harassing phone calls while i am at work and he is at home, harrassing phone calls to me while im at home and he is at home, oral promise for raise promotion, defamation while on disibility, bogus write up of poor job performance, demotion, job abandonment, retalliation for being on disibility ie if i ever go out on disibility again dont come back, defamation telling employees i quit because i sold my house? many of these issues i have already made reports to my supervisors bosses with no investigation conducted i have been with large manufacturing company for 18 years and i am a union protected employee who has been doing out of class work for 8-10 years meaning that of a supervisor i have a paper trail from here to china with wittnesses and documintation mine and other supervisors ie emails of inappropriate behavior by this department head what would be the best approach for all these claims due to the fact i work for a huge baked goods company in california these acqusations are true and backed with plenty of evidence with employee and union backing sincerly greendog