how do I escalate my claim above a “non-support ambassador”?

[Sarah3694]

how do I escalate my claim above a “non-support ambassador”?

I have been begging air bnb for support with a nightmare situation. We are going on nearly two weeks without any resolution. I have been assigned three different support ambassadors who have all promised to call me back and ignored me. There was one call back, but I happened to be busy and could not get to the phone. I call everyday with no resolve. I cannot sit and stare at my phone hoping to get a call someday. They keep switching my support ambassador and each one continues to ignore me and not resolve my issue. 

[George1920]

I have changed 16 ambassadors in 2 weeks