Yes, I would say it's on FEDEX too. I have no love for FEDEX, they misdeliver my pkgs all the time- they're correctly addressed, but they don't read what's in front of them.
Prey such as frozen rats need to stay frozen- otherwise there's a loss in quality- even if technically safe enough to feed, your snake can only eat one right now. When you re-freeze them, then try to thaw & feed them later, they turn to mush, may split apart when the snake grabs (bites or constricts) them, & may also be spoiled. Freezing doesn't kill the bacteria in the rodent's GI tract- it just keeps it from growing. All bets are off once they are thawed- that's why we don't re-freeze & re-offer rodents that a snake happens to reject. So IF you kept these & froze them, you'd not likely be getting your money's worth- your snake will be refusing them & they'll be gross, possibly spoiled. None of which is your fault. So I wouldn't accept them- no way. Insist they replace your order, & I don't think they'll argue, anyway. They can verify from FEDEX that the delivery was made today- a FAR cry from Friday.
Once you get the all-clear from BC to dispose of this order, you might check with any zoo nearby, in case they could feed them off right away to hungry predators in their care. Otherwise it depends where you live- if there's a woods/wild open area where buzzards or coyotes would consume them, that might be a good use for them. That's what I'd do, anyway. I used to live in the desert- the coyotes & such there would be happy-dancing over a "find" like this.