So I got round to using my travel voucher, I had a voucher for £2,250 and booked an economy flight of £400 using part of it.

I've had to change my plans and cancelled that flight.

So now Qatar Airways are saying that the entire travel voucher is cancelled and I will get the refund around of the original booking, minus the cancellation charge of that booking, which is likely to be in excess of £1,500.

No where does it say this that I can see, but can imagine it's going to be like speaking to a brick wall trying to get it resolved.