"Terrible service"

I have been trying to book my newborn baby’s 6 weeks appointment for three weeks now. The people on the other side of the line have been telling me to call a week before the sixth week to be able to book which for me sounded odd. Today is a week before so I called to book. Not only they gave me a seventh week appointment option but when I said that I have been calling for three weeks to be able to book the sixth week appointment the lady on the other side of the line told me that she didn’t have anything to do with it as it wasn’t with her that I spoke before. We are leaving the country so we won’t be able to take our baby to a postnatal appointment as we should have. Fortunately in our country of destination I have already booked an appointment with a good pedestrian so she will be checked properly. Thanks NHS for this awful experience.