How do I fix my car?

Might have to replace that nozzle neck piece that is attached to the car and the rubber hose that goes to the tank. Hard to figure out how they messed it up since the gasoline pump nozzle only shuts off when the fuel backs up into the hose between the tank and nozzle. Maybe there's a piece of something, like a siphon hose, stuck inside that hose to the gas tank?

While working at the Infiniti dealer I had a customer's G37x with the same sort of problem. After hours of messing with it I discovered that someone had taken a Payday candy bar and broken it up and stuffed it down the gas filler. All the caramel and peanuts melted into a plug in the filler tube right by the roll over anti-spill flap where the filler hose attaches to the gas tank.

A bad charcoal canister vent valve or flooded charcoal canister that's full of gasoline will likely be your problem. Don't top up the gas tank anymore once it's repaired!

Where the heck do you live? There are no gas station attendants in the USA!

EVAP vent valve is likely stuck closed.  Replace it.