Right hit a problem the other day

. Basically my petrol gauge was showing that I had fuel in the car but when I went to start it, it wouldn't work, so after playing with the car and getting a new crank sensor i finally decided to try and see if adding more fuel made it go which it did

.
Again the same problem happened today where the fuel gauge shows that I have more than enough fuel for the car to go yet it didn't again until I added fuel. However, when i'm driving the car for the last time before I turn it off and then it doesn't start, the car doesn't splutter or make any noises to show its got no fuel which i'm finding really odd :/.
Has anyone else had this problem or know what the F**K is up with my Shitroen?
Sorry for the rant I hope everyone understands what I just wrote