Terrible online service

I placed an order online to purchase a product which they said it was an error when I went to collect. Apparently they rectified the error this morning but at around 12pm I received an email stating that I can come collect my order. I tried to reason with the staff at Makro Germiston but they were rude according to me. Told me they would process my refund but didn't explain the process. I also asked if they will refund my petrol and compensate for a waste of my time since I spent 45min in the store without them giving me clarity. My arguing point was, if it was an error then no one should have collected, if others collected at the advertised price then what makes Makro germiston special. I didn't receive an email stating that my order was canceled. Is this how Makro does it's business?