There might be a multitude of reasons why they have not replied to you. it could be that the aupair or nanny has simply not logged on to their account or have simply been too busy to reply.
Ay maaaring maging isang tao ng mga kadahilanan kung bakit hindi sila sumagot sa iyo. maaaring ito ay na ang aupair o nars ay hindi lang naka-log sa kanilang account o lamang ay masyadong abala na sumagot.