Sorry to hear about that. All I can say is that quite often they turn back up --eventually.
Most cats do not wonder that far, so likely your cat is somewhere within the area. Right now the cat is probably somewhat afraid of its new territory, and lurking and hiding about. Night is probably the time it will be least afraid and move about, but also it is the time that it is hardest to see the cat. You can try going out late at night and listen if you hear the cat whining, sometimes they do.
Also, you can try putting flyers on neighbor’s doors. Eventually the cat should get hungry enough to approach humans. And there is always putting food out at night, unfortunately, you will likely pick up a few strays.
Hope this helps…good luck!!!