@Melva9 I would give the host a few hours to respond - perhaps until the close of business hours wherever you are visiting. If you've exhausted all of your contact options and still can't reach your host, you'll have to decide whether you want to continue your stay despite the issues, or terminate the booking and find somewhere else to stay tonight.
If the latter is your choice, contact Airbnb to initiate the process of getting your refund. Otherwise, there's nothing that someone in a call center can realistically do for you.