Call center person who can't pronounce words

I called the call center to block my sons phone. The woman says she needs to speak to the owner of the phone. I told her my son is 9 and any questions she has she can ask me. I had to ask her to repeat herself several times as she was slurring her words and could barely pronounce anything. As a person answering customer calls at a call center you need to be able to speak the universal language and know how to speak clearly and properly to people. I eventually had to speak to her manager to complain. So unprofessional that this is the service we get now a days. Companies seem to think they are in control of the consumers when its the customers who pay their salaries.