If the instructions to cancel aren’t allowing you to cancel, then worst case scenario you can just wait until it gets delivered and then file to return it for a refund if needed. Wyze has a really good return policy, so one way or another it will work out with the same end result.
My guess is that they processed the order through their Amazon Partnership, and Amazon already packaged it, so it’s too late to cancel now. You have 30 days to request a return though, so at least you’ll be taken care of still.