Notify about the decrease in the balance by SMS from Google tables

There is a user balance.
As soon as his balance becomes less than a certain value, we should automatically send him SMS messages every day at a certain time.

Sending a message stops when the balance becomes above the mark and a message arrives that the balance has been replenished and now the balance is equal to the value.

There is a User Base with balances.
The time of sending and the text of the message are customizable.
The list of users and the balance are in Google tables in certain cells (the format of the skin in person).

Program in python django.