They expect you to handle 60-80 incoming calls per day, most of which are emergencies. Their clients end up waiting 1 hour and more very often, drivers keep dropping the phone calls. And as a phone operator you are expected to absorb all that anger and deescalate.
They only allow two 15 min breaks during your 8hr shift and 1 non-paid lunch break.
As soon as you hang up, new caller is on the line.