Son hates formula help

Jess • pround momvof two beautiful boys
He was on similac reg but he started spitting up alot and was rely gassy but drank it with no issues..so I switched him to sensative he did ok takes it with a little fight wasn't really drinking it well.. but wic only provides Enfamil and now he fights the bottles spits up while drinking pushes the bottle away .. I dunno what to do.