Three times in the past 3 years, something has happened with my UPS deliveries. Twice, they said packages were delivered to my doorstep, but they were not there. They might have been mis-delivered or swiped off my doorstep. I never found out as neither was ever recovered. In both instances, the company I ordered from sent me a new product. In the third instance, UPS mis-delivered a neighbor's package to me.
It could be CS is backlogged from the holiday weekend, but I'm sure they will help you out with this. That is how it worked for me.
Good luck!