Good day. Help me understand the situation. Children are going to kind…

Good day. Help me understand the situation. Children are going to kindergarten for adaptation, it's understandable that they often get sick, the question is not in this. The situation is, we are going on sick leave, they seem to be messing with attendance records, we come with a certificate from the day of the first absence (we called the doctor home), teachers were warned in the evening that we are ill. We are asked to change the certificate, apologize and say that they will return the money for the mistake. Okay, I went to a meeting, half-heartedly changed dates at the clinic. Children were absent for a week, Monday, they call and say to pick up the child (coughing and coughing, although everything was