@Kirstie
I didn't suggest this, because @Damian32 has already stated he didn't trust the landlord to host the guests well (begs the question as to why he let the landlord take over his account) and because if you look at reviews on his profile, you will see guests who have booked since the landlord took over his profile have been unhappy with the service they received.
@Damian32 please take responsibility for the situation you created and contact Airbnb (2nd post Community Help forum) and work with Airbnb so they can cancel the bookings and help your guests find something more suitable.
Ranting about Airbnb and being rude to other hosts on here who are trying to help you, won't resolve the situation or help your guests.
You contacting Airbnb to sort this out will.