Hello @Sherly2,
You can contact Airbnb support.
One reason why there is a charge on your card is that Airbnb psometimes places a hold on the card that will later be removed when the verification failed.
The Article below has some information on that.
https://www.airbnb.ie/help/article/1424
Type "contact airbnb" in the "Search the community" box on these forum pages where you posted your question. Scroll down a little in the list of suggestions that appears and click on the "Contact Airbnb: A Community Help Guide[UPDATED]" one. That lists phone numbers and ways to contact them via Twitter or Facebook.
Steve.