They have misplaced my child's file

I am not happy with the services that I have received today at poly clinic Kwamashu. First of all last year they said they have lost my child's file I ha e to go back to the hospital so they can write a new file, so I did that and they wrote a new file. So today I went to collect my child's treatment and the new file was not found now they found the old one which was missing last year now they claim that this file is no longer valid I have to go back again to the hospital so they can write a new file. I am definitely not happy with their services because they are being careless with our health. How can an important file go missing am just curious about their carelessness.