Hello @Chris12596
You are posting in a community forum for hosts and guests rather than to Airbnb. All the ways of contacting Airbnb are in the CONTACT AIRBNB post towards the top of the forum you are posting in.
I am not sure why your husband didn't alter the dates on your booking, when you were not able to travel in March. Or what that means now you want to cancel. I would be concerned if he didn't alter the date and did not cancel, this will impact on your ability to cancel now.
If your husband made the booking and liaised with the host, probably best for him to liaise with the host and airbnb now regarding the cancellation as he will be aware of previous discussions.