Deponere in Latin but from prefix
Tone of voice is classified as verbal communication; appearance, body language, and facial expression are all forms of nonverbal communication.
Answer:
If I were you I would ignore them
"The people that drag you down are already below you"
Eventually they will give up and leave you alone
If you really must say something, dont lash out. It well let them know that you are affected by it and it will probably become worse.