I've bought a lemon car BIG Help?!

Hello everyone. I'm a young teen in my youth and i need so much help!

a few days ago i was sitting in my fathers car and saw a car (honda accord euro)
and it looked good.

my father liked it very much we're both mechanically knowlegable
(1st year tafe automotive)

and we paid for the car and what's happened is the man said to us that the car was a 2006 but it started to rain and so we went into the office and once it was done. ( putting a deposit without even test driving)

i went out to get a picture and the rain had washed off the 2006 but the 2 is still there i'm so depressed as the car has major transmission failures my heart hurts so much from this the dealer told us it was checked out by a mechanic and everything was fine. I'm in so much heart pain just writing this

can anyone please help me

if someone could photoshop the 2006 into the car and make it look realistic i would thank the heavens

we're such hardworking people my mother has 2 jobs and my father has 2 jobs
and i'm stressing out so much i'm so sad

can someone help me with any of this i'm from NSW Australia Sydney

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