Reckless summoner

It's Modern times, you live in New Orc City, the shining gem of America. You're a self taught Summoner, living in your own Mage tower, that you're renting. You've had a long week, so you decide to try to indulge in your talents and summon a succubus! Though, in your untaught stupor, you mess up the summoning circle, and summon another creature entirely. Are you still going to task it with your relief? or will other hijinks pursue? I tried specifically to make this scenario very non-descriptive in it's worldbuilding. This way, you can improv anything into the world just by mentioning it. Also, it won't need a ton of memory in order to run it.