How does the MMDA person know you even called the correct number? LOL You can even do this with a group of friends and have them know in advance that if you call looking for MMDA they will pretend to be from that office.
Driver: MMDA ba ito?
Friend: Nahuli ka ano?
Driver: Meron ako reklamo na gusto ireport.
Friend: Hahaha
Driver: Gusto nyo kausapin yung tao nyo.
MMDA: Sir si Cruz po ito.
Friend: Ano dahilan sa pag tigil nyo sa driver.
MMDA: Sir kasi..blah..blah..blah
Friend: Mali ka. Pakawalan mo yan at mag report ka sa HQ ng MMDA bukas.
MMDA: Opo sir.
MMDA: Sir pwede na po kayo umalis.
Driver goes home with all his money and MMDA looks like a fool reporting to HQ the next day.