Sounds like Lasership in the USA. Non-uniformed people driving the most beat-up, random private vehicles possible, with a "LS" decal slapped on the side. Seems Amazon doesn't want to pay for decent people. They don't even bother to ring the bell when leaving a package on the porch.
That said, I'm not sure they are worse than USPS and UPS, both of whom have left packages outside in the rain in the middle of the driveway without ringing the bell.