How to complain about the speed limit message of telecommunication network?

I'm telling you, if you want to complain, don't look for a place to complain, just look for the headquarters. . . Complaint number 10000 was handled quickly. If the headquarters doesn't handle the complaints in time, the bonus will be deducted badly. So it was dealt with quickly, hehe. .

I used to be a correspondent, so I was afraid of complaining. . . .