Bind a parasite to the skull when you mail to her
And hex the fuck out of it. Maybe you can anchor all of the negativity and b.s. she has thrown your way into it.
You could maybe do this (or something like it) and dump the vinegar into / onto the skull? Idk how resin skull making / setting worksâŚ
If she leaves an angry review on your shop saying you sent her a cursed item, she will sound like a lunatic. Depending on what she writes, you might be able to report it and have it removed. Idk if thatâs worth the risk of a bad review that you canât remove
You have her address though. You could send her something else cursed, or ashes from a spell (etc) anonymouslyâŚ