Pejo 206 fuel gauge problem

Hello, friends 2 weeks ago I bought a new pejo 206 1.4 gasoline 2005 model (no gas) I filled the tank, but the tank of the vehicle was not full, it remained in 3 quarters, I took it to the master. cooled down, we can't find the fault. EMERGENCY AID

Aleyküm selem these kinds of troubles can be usually troubles can be buoys, but you are strong in the buoy. The last thing to do is to remove the indicator and place it where it should be.