Welcome to the Lucky Mojo forum! We're happy to see you here.
Yes, your plan for binding their mouth and feet sounds fine.
If you are cursing someone, put all of your emotion into your spell. I find that being neutral-minded doesn't work for me, as I let out all of my anger towards that person as a natural part of working the spell. It's always helped the spell, in my experience.
Whether you want to give them a chance to atone and redeem themselves is up to you. Work your spell and see what results you get with them, then go from there.
Any time you work negative magic like this, cleanse yourself with Hyssop to remove the "sin" of cursing another. Recite Psalm 51 while cleansing.
HER-HYS-LEAF
Hyssop Leaf
$3.50


I hope this helps. Good luck.