Hi Susan
It sounds like it would be useful for you to spend a bit more time understanding how BNB works, to help you manage your listing.
(You may want to put your listing on snooze while you do this)
A few tips.
1. Use the search function here on these forums and on the Help function BNB has on its website (contact BNB is the most popular question here and has been asked and answered over 500 times ! ) Or look at the 2nd post under Community Help for phone numbers. You will find the majority of questions you might have, will have already been asked and answered here.
2. Pay particular attention to information about your responsibilities as a host including what happens if you cancel a booking, what BNB see as extenuating circumstances, guest rules, cancellation policy, what to do if you have a problem guest.
3. BNB won't see a relative or friend wanting to come and stay as extenuating circumstances - this is why you cancelled your booking (however you can try it and see if they will be flexible)
4. Remove Instant Book - it's not helpful for new hosts finding their way around how things work.