Hi @Francesca28
Sorry to hear about the problem between you and your manager...
If he already deleted the account don't botter looking for it... all the reservations got automatically...
https://www.airbnb.com/help/article/240/how-do-i-cancel-my-account
There is no way to transfer the property or the reservations to another account...
If it was his personal account and he manages other houses, he most likely delisted/snoozed the house and right now he is working hard to convince the guests and transfer the reservations to his other properties...