[¯|_(ツ)_|¯]

I get that it's frustrating, but people who speak limited English have to work too. There's no official language of the United States. I understand that it's hard when you're on the phone with someone and trying to do your job and you get wrong information, though! I get that at my job, or people who lie to me.
There's not much you can do about it, though. I will say giving her a speech lesson on the phone and trying to get her to practice is something that can be received badly and can be considered rude. Next time it may help the call go faster if you just stick to the point of your job. Perhaps next time you can ask to speak to the manager or someone higher up than her if you're having a hard time understanding?
Remind yourself that this is something that is out of your control. You can't control what others do, or how they speak. You can only control your reaction to it. It's frustrating for sure and even anger-inducing, but losing it over the phone will only make you more frustrated and angry in the end. It's not going to help the situation, and if you get reported it may even risk your job. Remind yourself that once the call is over she's just a blip in your day and you have a whole new day ahead of you tomorrow!