If it was one call, I’d agree with you. Better to check it out and find out it was wrong than to not check it and miss abuse. Maybe this can excuse the second and third call as well. But when you get to the 24th time, maybe the agency should be questioning whether this is a person trying to use their agency to harass the person. (The CPS version of Swatting.)
They should refer this matter to the police and have them investigate who is making these calls. Not only were they harassing a family that they’ve checked multiple times, but they are both diverting resources away from actual abuse cases and are causing the abuse that they claim to want to stop.