Papa John's Pizza in City of London, Westminster

We had ordered a range of pizzas. Including a vegan option and vegan sides. The app informed me it was ready to collect. But then when we arrived we were told there is no vegan cheese. So we requested to have it refunded. This couldn’t be done as no one knew how. I was told to return the next day, when I did the shop was closed and area manager not easy to contact. We were not local and just visiting London so this is very difficult to follow up and poor service. The remainder of the order then took 30 minutes.