They called from (855) 418-0111 and left a message saying something like “your computer protection plan will be deactivated today as we are shutting down online support, call us on 866-457-2555 to claim your refund”. Exactly what they said is in the recording:
866-457-2555wav.wav
Similar but a male sounding robo call from the same number:
855-418-0111 | 18554180111 - Phone Scam Alert! - Nomorobo