OK you want to import a Car. Who gave you the idea that the agent will take the papers and your car comes imported and you pay a fee.
You need Certificates of Conformity, you get those ideally English and Portuguese.
You go to the Consul and make a declaration that you are now resident in Portugal.
You go to the Customs to get the Forms that you need to get the car tested.
You take the car to be tested it's a special test and you have to go to the IPO test station that does the test..
Do you notice i keep saying YOU and how do i Know because i did everything that the agent had to do and i don't speak the language.
I went out one afternoon to find out from the Customs i had to do to get my car legal. At 2.14pm the next day my car was legal.
If you use an agent you will do most of the work and pay about 500€. The agent will probably wait until he has a few to do and all he has to d is sign a few forms.
After you have done most of the work why not complete the task yourself.
First thing to do is find out your nearest Customs office and ask them what to do.