I have two one way bookings, EDI to VCE and VRN to EDI which I'm trying change to x2 return bookings in 2021, this is so that I can maximise the return on what I've spent. But I don't have the ability on the change flight option to add a return? Is this not possible? I'm sure calling them will be out at the moment so may have to wait a while if this is possible at all.