Insistent, incomprehensible and unprepared employe...

Insistent, incomprehensible and unprepared employees. It seems that there is a lack of communication within the company where the system of observations noted in previous contact is not given importance.
Charges made in duplicate ways by post which can mislead the customer.
Continuous telephone calls throughout the day and even at night, disregarding business hours.
Several continuous calls during the day of several employees, even having already made contact on the same day, and the excuse is that the calls are automatic or incompetence of the IT department. Faulty and inadequate system.
Employees concerned with achieving goals and disrespecting customers, being most of the time unpleasant and inconvenient with abusive attitudes.