You can make an appointment for the hospital yourself by calling them. The  doctor's assistant has told you which hospital and which department you need to make an appointment for. You can find the telephone number of the hospital in the telephone book.  You can also ask a COA staff member for the telephone number to the hospital. Do you find it difficult to make an appointment yourself? Then call the GC A: 0 88 122 112. They will help you make the appointment.