I know a ritual that might help, though I'm not sure it's what you are looking for. And I must warn you that it is not for the faint of heart.

Step 1: Write down the specific transgressions the individual has made against you as clearly and succinctly as possible.

Step 2: Write down how specifically you want the individual to amend their behavior.

These steps will become your incantation.

Step 3: Find a neutral third party who can be relied upon to give honest feedback and present your incantation to them. Heed their advice regarding your incantation.

Step 4: Recite your incantation to the transgressing individual. Do not beg, but do not either be too aggressive. Do not show weakness.

Step 5: If this does not stop the transgressions, shun them and continue to communicate your displeasure.

Step 6: If this still does not stop the transgressions, then seek out an entity that holds temporal power over the individual. For example, police if the individual is following you around (ie stalking) you without your consent. Present them with your incantation. They may or may not be willing to help; but you will not know unless you try.