Maybe you could try a protection pouch, but when making it, specify that you want any harm sent towards you to be sent back to the sender. Which means you'd basically be combining three spells together. A protection spell, a "Back to Sender Spell", and a Karma spell (Which is similar to the Back to Sender spell, but ensures that you get vengeance via the Law of Three.) Once made, you would need to carry the pouch on you at all times (i.e. in a wallet, discrete pocket of your purse(if you have one), in your pocket, or around your neck, etc.)
You will need to do research on herbs to use for protection, shielding, and warding off, and look through this site's Ward off/"Back to Sender" spells and Karma Spells, to see which ones seem legitimate and which ones of those will fit easily in with the protection Pouch spell.
Feel free to message me if you need help, I'm almost always on or can be available quickly.