Your other option would to try to get help from the IRS Taxpayer Advocate Service, but they are likely difficult to reach, too. Go to the website below and get the contact number for your state. Also read the shaded box there about how the Coronavirus is affecting their service.
https://taxpayeradvocate.irs.gov/contact-us
Also see this article for more info on how the Taxpayer Advocate Service works::
http://www.irs.gov/taxtopics/tc104.html
