Language barrier during service calls

It's pretty bad when I have to say "excuse me"...or "huh"....or "I'm sorry, I didn't understand you"  multiple times during a call with someone at customer service.  I called to simply schedule a tech to come out and install a second line in my home, and it was incredibly difficult for me to convey that request because the person I was speaking with could not understand English very well, nor could he speak English very well.  I shouldn't have that problem!!  VERY frustrating as an American!