i would advise against doing that. negative dealings will come back to bite you in the butt. i would try to get over it, or perhaps set up a protection spell to keep yourself safe. if you must [though i'm not going to tell you how] start by researching the demon so you know what you're dealing with and how to stop it. after conjuring it, you would tell them to go to this person house to cause mischief, in exchange for something the demon favours. as i said, don't call on a demon, there are many other options to choose from, such as forgiveness, or a revenge hex. demons are tricky and can be very dangerous, i wouldn't go down this path if i were you.
I agree with Nekoshema. I think if you want to send a demon, you may also want to learn to conjure. Reversals are pretty good even in non magick dealings. If you get good at conjuring, you can attach a demon to the reversal, it seems to work well for me that way.
well I would advice not to go for a revenge. I am a ghost hunter, I have never face a demon possession. I have heard numbers of stories on this don't ever try, because what you try on others will definitely come to you one day even if you are a master in dark arts and black magic.