I am dealing with this as well. Tips I have been given from lactation consultants are: try to recreate a positive relationship with the bottle. We put baby in a seat and let him suck finger while syringing milk. We also let him chew a bottle nipple while doing the same thing. This is to show that milk can come from other places. Only do this when baby is happy. When attempting a bottle feed, only do an ounce or small amount while they are super sleepy/not hangry. If baby starts to have a melt down, stop and try again when happy. Try these things every single day.