Hope this helps. I find it annoying they don't have a phone to call.
Here are 3 easy ways to contact Airbnb:
Airbnb Community Experts
Via Twitter Direct Message @Airbnbhelp
Calling Airbnb
1. Contacting Airbnb's Community Experts
The easiest and quickest way to get answers to any issues is through contacting Airbnb's Community Experts. If they cannot answer your question, they have the ability to re-route you to Airbnb
Step 1: Visit https://www.airbnb.ca/help/contact_us
Step 2: From the bottom of the screen, choose either "My question is about something else" or "I have a different issue"
Step 3: Follow the prompts to figure out what best describes your issues. Some things you choose will take you to specific information whereas others you can fill in the text box and submit your question.