Mr D is charging restaurants for orders they collect but don't deliver

I placed an order via the Mr D service at 16h12 yesterday, for which the estimated delivery time was 17h10. After the initial confirmation that the order had been accepted by the restaurant, I heard nothing further. When my order hadn't arrived at 17h45, I phoned Mr D support and they advised me that the driver was waiting for the order and the restaurant hadn't started preparing it, so they had cancelled it. I then phoned the restaurant who told me that the order had been collected by the driver from Mr D. This morning I receive an email from from Mr D apologising and advising me that the restaurant has been billed - this is not ok. Why should they not get paid for an order that Mr D collected but didn't deliver? Mr D should have notified me of the delay and delivered the order.