@Nikki35
1. Always start a new thread rather than jumping on someone else's - avoids confusion and increases chances of you getting a response
2. As a new host it's really important to understand how BNB works before letting your listing go live. If you had done so, you would have realised if you turn on Instant Book you lose control over who books your property - Turn it off now
3. You got penalised in line with BNB rules because you cancelled a booking (look at information on their site for hosts about cancelling a booking and penalties you will receive) which they see as a major no no. Call them up explain you are a new host and ask them to unblock. If you don't have the number use the search function here.
4. Unfortunately it got off on a bad note because you didn't fully understand how BNB worked before you let your listing go live. Might be worth putting it on snooze and reading info for hosts.