Modern customer service is about willfully designed layers of broken system engineered specifically to frustrate the majority of people that can't regulate their emotions. It's always a series of about "12 doors" you have to cross through that are exceedingly difficult to pass through. They are designed to sap your energy with the hope that you eventually reach a boiling point, hang up, get distracted, go on with your day and never follow up out of fear of starting the same process again.