Why do I keep getting added to groups I don’t want to be in

Noradun • 🌸Due in Sept 2019 with 🌈 after TTC 3.5 yrs with PCOS👣Mommy of 5 💑 Married for 14 yrs👩🏼‍🎓Graduating in 2019 👩🏼‍💻 WFH Mom 🌼

I regularly go through and delete myself from groups, yet I keep getting added to them, how can I make this stop?