Why did the hotel reserve a limit amount?

This is often a pre-authorization: the hotel reserves a portion of the limit as a guarantee for potential expenses, not a final discount.

The reservation temporarily reduces the available limit.

Ask the hotel about the reservation amount and release date, and if it continues after departure, obtain proof of release and follow up with your bank.

The figures, fees and limits in this answer vary by bank and change over time — confirm them with your bank or the official source before acting.

Source

• Central Bank of Egypt — Know Your Rights