Well, all spells are essentially free because you can always cast spells without ingredients just using your powers of intention. When you pay for spells, you are paying for the spellcaster’s experience and powers. If you really want your spells to work then you should definitely hire a prof...
Additionally, rather than binding someone who is causing you harm, thereby forcing them to stay away from you, a Wiccan witch may instead cast a protection spell upon herself or someone who she is helping. Here is a common Wiccan protection spell. But remember, don’t try these at home!