Verbal Job Offer Rescinded

Background: Have been in the interview process for 8 weeks. Have done everything they asked. When I finally got an offer, it was verbally agreed upon. I was told that the manager I was talking to was the one who would be doing all the hiring paperwork and I would get the formal written offer this past Monday. As part of the agreement, I only gave my current employer 1 week notice because my new employer has a huge event this coming Thursday and I was told it was imperative that I be there.

Fast forward to Monday, and no offer and now I’m being told the CEO has taken the hiring out of the managers hands. No one is returning my calls.

I quit my job and as of tomorrow, do not have a job as far as I know.

Any suggestions would be greatly appreciated.