Ah mama, I feel you, that transition back to work while baby's adjusting is tough, lalo na sa ibang bansa pa kayo! Have you tried introducing the bottle slowly, like starting with expressed breastmilk first if you're breastfeeding, para familiar ang lasa sa kanya bago i-transition sa formula? A few of us moms tried warming the milk slightly or even changing the bottle teat, sometimes babies are just picky about the feel, hindi talaga sa milk mismo, so might be worth experimenting with different bottle brands. Since she's refusing S26Gold, you could ask your GP or practice nurse there sa New Zealand kung may iba pang formula brands na pwede ninyong subukan, and they can also give tips on the weaning process na specific sa age niya. Hang in there, it takes patience, pero kakayanin natin ito!