1, just write the complaint commitment in the title.

2. Write down the reasons for the complaint in the text, and then promise what to do, how long, to what extent, and what specific measures to take to realize your promise.

Finally, you should show your promise here. If the above guarantees are met, you can also use polite expressions like this-salute. Can also complete the text. Finally, just mark the time in the lower right corner.