Ordered for collection, after the 20mins my order was not even made

I have already placed an order with Romana pizza san Ridge Square in thier busiest time and I have already got the best service, I would get there and my order will be ready for collection. I have done the same again. Got the best service when placing as always, when I got to the place not even busy but they haven't made my order. I had to wait while they trying to fix already made pizza so they can replace my order. I am really disappointed as this was one of my favorite places which always delivered and never disappointed.