Give right info please

I called them beforehand to check when I can come for a Covid test as I needed to fly to Namibia. Told me to come between 3 and 7pm. No need to make an appointment. Got there at 6pm, told me I needed to bring my passport. Also told me that the last appointment is at 6.30. Got back there at 6.35pm. Didn't really want to help me but helped me thankfully. Maybe don't tell people you can go there until 7pm when it's actually 6.30pm.