Bounce Back Sigil
The most potent way to work a pay back spell is to literally return someone's negative actions or energy back at them. So use a mirror to have your revenge.
A small mirror
Black paint or marker
Piece of black cloth
You need to design your own revenge sigil (magickal sign) for this spell, so I can't just give you one. The idea is that you write a short phrase or even a single word, the combine the letters to create a single design. Typically, you leave out the vowels, so focus on the consonants.
So to return energy back to someone, you could use "RETURN" and design a shape with RTRN in it. Maybe like this:
Ok, I guess I am giving you one. This would work if you really can't do your own, but the spell will be a lot more powerful if you create a more specific and personalized sigil.Cast your spell at midnight, drawing the sigil in the middle of the mirror in bold strokes.
Set the mirror up in a window, facing outward. Leave it there for 3 days, then take it down at midnight again. Wrap it up with cloth and leave it on your altar until you feel your pay back is complete.
http://www.free-witchcraft-spells.com/pay-back-spells.html