Dear percysmith,

Thank you so much for your reply!

I spoke to two CX representatives today and both told me that I have to refund the ticket at a cost of USD$120, wait for the 90'000 points to be re-credited and then re-purchase at 115,000. I found them unfortunately quite abrupt when I tried to question it. They said because it's an award booking on BA, that's the process... I have never had this problem with other airlines before.

Is there any documentation or a specific phrasing I can use perhaps? I'm unsure how to proceed, but that above, is a rather unfortunate process just to change the flight one day later.