Just had my a tune up and oil change now my car want start what could it be?//// on 2003 BMW 325i

The shop say its fuel pump but i had no problems befor i got the tune up and oil change. I have 2003 BMW 325i

Asked by for the 2003 BMW 325i
It could be but that's odd ,they had to screw something up, that doesn't sound rite or fair but possible.