Sorry to hear that you’ve been dealing with so much drama. If I were in your shoes, I would use a cow tongue curse or would invoke and worship a goddess named Bagalamukhi. Maybe both.
The cow tongue curse is a classic in African traditional religions, in hoodoo, and in brujeria. The method is said to even have stopped witnesses from being able to testify in court, then becoming tongue tied or temporarily losing their voices. Go to a butcher or other place that might have a cow tongue for sale and buy it. Gather as many nasty, hot, sharp, and toxic things that you can. Razor blades, pins, needles, broken glass, chili powder or flakes, stagnant water, rusty nails, vinegar, slices of lemon or lime, etc. Anything hot, sour, or nasty is right for this. During ritual, slice the tongue open and place the name papers of your exes into the tongue. As you fill the tongue, visualize them shutting the hell up and being forced to. Say something along the lines of “Everytime so and so says my name, may their tongue rot and burn with the fires of hell!” Calling on Glasya Labolas or other demons during this ritual is a great idea, the restless dead are also great to call on. The tongue can also be stabbed and stuck with pins, pushing all of your rage into it and at your targets. After the tongue has been filled, identified with your targets, and the demons have been sent out, bury the tongue either in nature or ideally at a graveyard (be careful doing this, obviously). A lengua (cow tongue) curse is a vicious spell that is very effective at stopping gossip. Good luck! Feel free to DM me if you need more details or ideas.