Day-care

These aunties at my daughters day-care doesn't give her any milk during the day (I express the breast milk) they claim that she doesn't want it or she's not interested mind you she's only 9 months.. however I do give her solids, potato carrots plantains etc.. but almost for the past month now they claim she doesnt want it from the bottle, when she's with my mom however she drinks the same milk they say she doesn't want ..I'm a first time mom so I guess they're watching me aa an idiot what do y'all suggest I do help needed asap!!