[mothered]

denied it a few days later claiming to contact my local PD in regards to the monitor since it was "stolen off my porch."

On the grounds they're responsible for loss of goods, they're liable for the said theft-related Incident.

They should've made sure you personally received It, and not leave It unattended at your porch. As such, It's their error and responsibility for nonreceipt of goods, not yours.