There's really nothing that anyone in this public user-to-user forum can do for you that I would call "help.". But I would suggest that you gather up all your e-mails and other documentation and seek the services of competent legal representation.
Now it "may" help if you first visit your local tax advocacy office. Find the one closest to you at https://www.irs.gov/advocate/local-taxpayer-advocate While that "may" help with the tax situation, dealing with the audit defense you paid for and are not receiving, would be a completely separate legal issue that were I in your shoes, I would consider addressing with legal representation.
