Hello @yolande!
Sorry to hear about this nasty coworker. It sounds like she is making things difficult not only for you, but also for everyone else in the office! I agree that this is not fair to you and your coworkers. First things first- have you talked with your boss or supervisor about this? Oftentimes disruptions and harsh working environments lead to lower productivity as employees are stressed. I think it is in your boss’ best interests to separate this negative co-worker from the rest of you!
Aside from seeking help from your boss and trying your best to avoid this nasty presence, you might also want to try a new form of shielding. Since you have already tried cord-cutting and established that your bond goes deeper than just this lifetime, I suggest trying some kind of bounceback spell.
This Return to Sender Spell promotes karmic retribution. Francisco has also shared a great bounceback spell here:
While your coworker may not be sending harmful spells your way, she is sending harsh words, bad insults, and negative energy- all of which you have the right to deflect away from you. Perhaps sending her own energy back at her may help to deter her in the future.
Keep up with the protective spells and rituals too! 
Surrounding yourself with protective items and energy can only help to lift you up and keep you strong aginst this bad influence!
Stay strong, Yolande- I’m sending love and light your way 
Good luck and blessed be! 