A confirmed Roomza booking cannot be edited in place. The hotel, dates, and rate are locked to the reservation the hotel holds.
The honest path: cancel and rebook
Still inside your free cancellation window? Cancel from your trip page, then book the stay you actually want. The refund is full and sent right away, so you are not paying for two stays at once. See How do I cancel a booking?
Check the new rate before you cancel the old one. Prices move, and the room you want has to be open for the new dates.
Outside the window
Past the deadline, or on a non-refundable rate, canceling forfeits the payment. Rebooking rarely makes sense then. For small asks, like a late check-in or a room preference, message the hotel or the concierge instead. See Messages and the concierge.
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