My baby was like that too. Perhaps start with feeding her breastmilk from the bottle first? My baby was resistant to this for many months, and we went through a lot to train her to take from the bottle. Once that finally got better, then we introduced formula milk gradually (mixing some into the breastmilk).
Same for my son when i was weaning him off... had to try multiple brands of fm before he was finally willing to take fm. he’s on Bellamy’s and we never changed it ever since he accepted it
keep taking milk boosters. my LO is 12.5 months and still exclusive ly breastfed. i still pump twice during the day when she's at infant care though, only DL at night
mine too I boost my supply when I realised it dip
Mummy J