Worst service given by Receptionist

I went in with my spouse befor 12:00 and they told him the available slot is at 15:15. I booked online while I was there for 13:45 slot and checked myself in. They called my name for screening and asked me sit aside for 5 minutes because they will change my name to his, since he's the one that needs to do the screening. The receptionist refused to do the changing and are not communicating anything. When i went to ask what's going on they said he needs to wait for the time they booked him for. It's the worst service they give to people who are ill. They are so rude 0