A binding’s purpose is to stop someone doing something - to bind them away from doing it.
You want someone to stop talking to you, it’s pretty self explanatory isn’t it? And can be done with simple low magick (witchery not ceremony).
Try vovin’s freeze spell in here: Unofficial Forum Tutorials: Bindings and Stealth, Freeze Spell, Glamours and Invisibility
Phone typo - petitions.
Yes. for this kind of thing, and probably her least complex workings that I am familiar with, 29 Deadly Sigils.