Where’s the refund? No help from Airbnb!

I have been trying to get a refund for a canceled stay overseas. The host agreed to refund but my bank account was closed when I moved cross country and airbnb said it had to go to closed account. An airbnb employee gave me incorrect info and the host reduced the amount of refund because she thought I accused her of lying about the location of the funds. Airbnb has has been EXTREMELY difficult to contact and now lists a password to a pdf file for my refund info but there is NO PLACE to plug this password into, no location for the file, no way to respond to this latest email that doesn’t just go to an automated choice of subjects- like being stuck on an automated phone answering system that doesn’t include the title of person or number you seek. NEVER AGAIN.