1998 Chevy Astro new fuel pump is noisier than old one

Noises problem
1998 Chevy Astro 6 cyl Two Wheel Drive Automatic 139, 0 miles

i had a new fuel pump installed by a mechanic and the new one was so loud I thought an emergency vehicle was following me he replaced that pump and now the present one is making a high pitched noise also. You can hear it inside the van going down the hiway. Is there some way to fix the problem the new pump is worse than the old one. Which is why I replaced it. Because the mechanic told me it was going out. He said it was normal . He charged me $940 to repair.