Thank you for your reply and clarification.

I wasn’t aware that Accor reservations can only be cancelled and rebooked and not amended.

Doing so a few days before arrival - the two nights were costing almost same as the three nights I’d booked 2 months ago.

The hotel wishes to charge the full amount even if I depart early.

If CS had just explained what you’ve told me it would have been so much more helpful!

Thanks!