Spec-Savers Newcastle

So I made an appointment with Spec-Savers Newcastle for the 30th of July 2022 when I was in Newcastle on the 9th of July. So this wasn't a quick made appointment that was made. I'm from Volksrust about +-50Km away. The reason for the Saturday appoint is obviously the distance and I work 8-5 Monday - Friday. Received a call this afternoon asking if I could move my appointment to somewhere in the week? When I was there I did tell them I'm from Volksrust and the only time I have is on that weekend. Now none of the optometrist will be there on that day. Why made the appointment for that day if no one would be there to assist people. This would've been my first time with any Spec-Savers and then this happens? This is really not the way I wanted it to go.