As a customer of many companies who has also worked in call centers, I can't tell you how frustrating it is when I, as a customer, have to call back and the person I speak with has no record or an insufficient record of my last call. This has required me to repeat myself, resend emails, and wait all over again.

It was equally frustrating when I, as a call center worker, had to ask the custmer to tell me what should already have been noted. This has required me to apologize and to do someone else's work in addition to my own.

Summarizing calls is not a waste, it's just good business.