cant seem to sort this one mite need sum new fuel pipes costly??

just doesnt seem to want to fill took me 25mins roughly to fill it up not impressed and the fuel gauge takes half an hour drivin to catch up on the fill still sum times says quater when im on full !!!!!

this probz grinding me to the max lol

also when i fill it,it makes a gulping sound and now the caps removed theres no ssshhhhttt sound as i open the cap could there be sumsort of air lock ???