Victoria Flint and her boyfriend attended Spontaneous Potter on Saturday, May 13, to celebrate her 42nd birthday.

Both had purchased new cloaks and wands for the event, but were unpleasantly surprised as soon as the performance began.

Victoria said: “The first thing that the main character said when opening the show was, "I have never watched a single Harry Potter film or read a single Harry Potter book".

The audience then reportedly gasped, to which he replied, ‘and you can suck my balls!’”

Victoria said: “It’s not really what I paid £20 each for a ticket for, not what I think many people around me really thought that they paid for. We decided to leave early, it wasn’t anything to do with Harry Potter.

"It was just a group of four people that were doing some improvised comedy, and it had no bearing on Harry Potter.”

Victoria wrote to Wiltshire Creative, requesting a refund on her ticket but had not received a reply at the time of writing.

Victoria said: “[The presenter] did say, ‘Ah, I’ve been wanting to say that,’ because they did a children’s version of it, and he said, ‘I wanted to say that in the kids’ performance, but obviously I couldn’t.’”

Victoria said up until that evening, her birthday had gone well.

She said: “I’m a bit disgusted and appalled by it really.”