worst service ever

good morning

on the 30.01.2020 I make an online appointment for the 02.02.2020 for 9:00am to get the special Buy 1 Get 1 Summer Promotion and I received the confirmation via e mail. on Sunday the 02.02.2020 when I got there I was advised that the optometrist was not available at that time so I went and did my errands around the mall and when I got there around 10:45 I was advise that the optometrist will be available after 15minutes meaning at 11am for a 9am appointment

Spec-Savers Southgate don't have good customer service as the lady in the reception did not even bother to check my appointment and confirm, she just told me that she was not aware of the online appointment and just told me that the optometrist will be available later.