Aptamil new formula

Has anyone's baby refused the new updated apatamil formula? My sisters baby was fine til she got the updated formula and baby is refusing milk. Sister also said it smells really fishy, and it taste very different to the original version. I have told her to ring up stores to see if the old formula can still be found even though that will only solve problem for a short time

(Sorry couldn't find where else to put this thread)