Momentum - Booking reference number : 0-*** cancelled

My booking cancelled at 04h48 on Saturday morning prior to playing on the Sunday, in contacting Momentum via their 'contact us' tab four days ago I still await a response as to why it is I should lose out with the course in question cancelling at the 11th hour.

I booked more than a week in advance and now financially at a lose and seek compensation however with their call centre not responding, I am hoping someone in the organisation will now take my query and complaint seriously.