What should I do if the teacher sends abnormal text messages to harass me?

It's simple. Do you have the function of filtering text messages and incoming calls? If there is, you can filter the teacher's phone calls and text messages to ensure that you can study with peace of mind.

If not, you can ignore it when you see him texting you in the future. Didn't it show up when the text message came? Just look who sent it. If he sent it, just ignore it. In addition, regarding the question of making a phone call, he was specially set with an ultra-quiet ringtone, but he still didn't answer the phone. If you put your mobile phone far away, it won't affect you, or just turn the ringtone into vibration.