Twisted - The Brussels operation is the administration for the participating countries which impose the flow control in the first place. If your slot is cancelled then either the regulation has reached the end of its required period or has been withdrawn. Your company Ops department should be fully aware of exactly what sector in which Area Centre was delaying you. If their action was unreasonable get the company to ask for a reason.
If you don't challenge you won't get answers. We have to answer questions every day in the UK - don't see why others shouldn't as well after all they are public servants.
