Hi @Jon_Colman
Try giving this a full day to clear. The data purging processes run in the background. Refresh can help this to happen quicker but it is not immediate.
Meanwhile, remember that you have access to all of the UseGalaxy servers and your account at each has a distinct data storage allocation. An overview is here if this interests you. → What should I do if my data exceeds the given 250GB of storage?
If this doesn’t clear by tomorrow, please let us know and we can help you to look into this more. Confirming you are working at the UseGalaxy.eu server is a good place to start. Thanks! 