Could you get something from the breeder so you can introduce Alfie to her smell - like a blanket from her bed.
I would then let him smell her in the carrier when you bring her in but let her out in a quiet room with food, bed, litter tray etc in and let her investigate without interruption. Then once she seems settled let him in too and just supervise their reactions to one another. In my experience they will hiss and maybe growl and shout a little at one another this is normal but if it's a full on screaming fight you will have to seperate them and take things slowly putting them in seperate rooms and letting them sniff one another through the door before they're more familiar and then try little meetings and see if they become more friendly.

Emily