Your ad has been unpublished because you haven't answered to two booking requests in a row. Relax, it wasn't to punish you, it is just our policy.
The aim of this feature is to help the hosts not being disturb by some booking requests they can't answer, like during exams period.
Then, you'll be able to publish again your ad whenever you want and when you'll be available again to host some travelers. So the requests you've already accepted are not cancelled.
We advice you to use the Calendar in order to indicate when you're available to host.