Had to change the dates of our hotel booking. It was a non refundable booking, but contacted the hotel directly and they had absolutely no problem changing the dates. This was confirmed by email. The hotel did ask for me to get in touch with hotels.com to amend it on their system

Contacted hotels.com 10 times now and each time they fail to make the change. They are so inept at their job they can’t even get in touch with the hotel. I did it personally and it was so easy. I even gave them the contact details of the manager they need to speak to. Quite ironic for a hotels booking company to not be able to get in touch with hotels