If you have sent a jobs to Lasernet from Dynamics using service bus queue and would like to cancel the job somehow, use the following guide:

Download the "Azure Service Bus Explorer" https://github.com/paolosalvatori/ServiceBusExplorer 
Add your connection string for your azure service bus - then you get this overview of your bus with all the queues.
If you want to purge a queue - you simply click purge - and the queue is emptied.