Originally Posted by
SteveF
Oh I see, I thought you meant buy with cash

. Yes it's much clearer

. I suspect that the answer is yes, but it may be effectively classed as a cancel and rebook, which should be possible in one call if you get a friendly agent. I'm pretty sure that the change fee will be applicable though.
usually a cancel and rebook with no guarantee that the seats will drop back into the redemption bucket.
Ive had mixed results with this on club seats - 2 booking the seats drop back in and were available for a rebooking, 2 others (possibly more popular routes) didnt so i cancelled the whole trip.