@Kurt80
You need to use : Airbnb Help: contact and choose the right options for your case from the menu.
Depending on your input you will end up in a chat or you are provided with a phone number (or get automatic responses)
Phone numbers are also listed in this (old) overview (not all are operational anymore):
Contact Airbnb - Community Guide [Updated]
If you need general advise from other members, you can also post your question here in the community.