Advice needed about new cat

Elyse

So yesterday we travelled an hour and a half to get a Turkish Angola who is about 3 years old she’s a sweet princess but hasn’t been eating anything at all not even water or milk tried to put salmon paste on her mouth so she would lick it but she didn’t even want that, we noticed that she kept licking her mouth so had a look and she has what we think is dental disease so we’re very worried any advice to get her to eat anything or what to do? She’s also missing a tooth