Many teachers contact me and say: "I never get a reply from students."
The time, effort, and care you put in your job application (first message to student) matters a lot. Most people send a hurried one line message. They are obviously at a disadvantage as there are a lot of people who are willing to make an effort to craft their application.
A Russian student posted requirements for an English teacher. The teacher who got the job applied in Russian itself. That's personalization. That's showing that you care. She showed that she is the best they can get. Other teachers who sent a generic, thoughtless message like "WhatsApp me at xxx" didn't stand a chance. They didn't even get a reply from the student.
If you apply for a job and student doesn't respond - this is what you need to do.
Write your application/first message in such a way that: