So to close this off: I was correctly awarded point earlier today. To get them to do this, I give them the option to either give me the correct amount of point based on the invoice or to admit I was overcharged and refund me the difference between the charged amount and the amount used to compute the point. The agent requested a copy of my bank statement, which I provided and then came back and confirmed the correct amount of point and credited it. No reason as to how they got it wrong all along when the invoice was perfectly clear, no apologies. Well matter close but this story has left me with a sour taste in the mouth. Customer service at Accor is now in my mind wholly incompetent.