2005 astro van wont start

Changed fuel pump ran good for a
few weeks but it pinched a line
when someone lifted tank back up
for me. So I replaced it and now it
wont start. Have changed fuel
pump, fuel filter, spark plugs ,
fuses, sensor and air intake... I'm a
woman who's not a mechanic and
I'm about to blow this van up
because ive had 3 guys try to fix it
and they had no idea what they
were doing... I need help.