UPDATE
Thank you for your responses.
Boomerang Jam have released an official statement to the public:
^"Dear All
We are very sorry for the disappointment that has been caused to people who attended the event on Sunday and Monday. We are also very disappointed as the event did not go as we had planned and subsequently we take full responsibility.
We are facing this and everyone who emails us will receive a response.
Individuals in our team have been the target of personal attacks both online and offline. They have been frightened and upset. They are working really hard to make sure that everyone receives a positive outcome, please allow them to do so without intrusion or threat.
The event ended 48 hours ago, so we are still organising the process of refunding you. We will refund you as quickly as we can and thank you for your continued patience.
If you wish to contact us please email [email protected].
The Organisers of Boomerang Jam"^
A spokeswoman from Leeds City Council has informed me that in no way did they help organise or sponsor the event. They wanted to share some of the events that were happening in the city over the bank holiday weekend via their website and Twitter.
They are soley reliant on the event organisers to deliver appropriate facilities and activities at their venues when using materials to promote Child Friendly Leeds.
They are using the feedback from the public to improve how they can regulate this more effectively in the future.
They have passed on comments that they have received to the Boomerang Jam team to express their concerns and they hope this feedback will enable the organisers to deliver a better service in future.