Yes, you'll find most hotel reservations are fully refundable provided that you cancel prior to the accommodation's cancellation deadline, which is often 24 or 48 hours before the scheduled arrival. If you booked a non-refundable reservation, it might still be possible to cancel it and be given a refund within 24 hours of booking. Add your dates and click on "Search", then use the filter option "fully refundable" to get the best deals available near Gorongosa National Park.