Necroville (2007)

In Necroville, a city overrun by zombies, vampires, werewolves, and other monsters, Jack and his best friend Alex find work at Zom-B-Gone, a monster extermination company. Battling the legions of the undead at work and desperately trying to please Penny -- his horrible, selfish girlfriend -- at home, Jack's two world's collide when Penny's ex-boyfriend returns to town, as the unholy master of a coven of bloodthirsty vampires.