How do I send a text message to the principal to tell me that my basic salary has not been increased?

Hello, you can say this:

Hello, director of a certain garden! I am a teacher so-and-so in the kindergarten. I negotiated with you before and said that my salary would be raised starting from a certain month. However, I see that my salary has not been raised this month. Please confirm with your accountant to see if you have forgotten this matter. Waiting for reply, thank you.