if you are in very bad situation with some uneducated customers ,how you will deal in this case if you are working as customer services ?

As the saying goes, "the customer is always right", one has to make every effort to make sure even the most "uneducated" or hard to please customers as satisfied as possible.
One solution is to empathize with them so that they know that you are trying your best to assist them with whatever it is they want.
Even if its not something you can help a customer with, its the way of telling them "no" that really matters.
Put simply, put yourself in their shoes and think about how you would want to be treated should the roles be reversed.
That being said, if the problem is them not understanding you because of language barriers, the best option would be to break it down for them in easy to follow steps and if that doesn't work, then try to find a bilingual colleague to assist you.

we should make it easier for them and these ppl are the preferable for me .i had too many clients like them they will help u reach ur target quicker...

In this situation u must talk with him in Emily face even he is too much angry and try to know the exact reason and the make a try on ur behalf juz to satisfy him ask for a cold drink and also talk to him in his language in a frankly mood so he cool down n admit that what ubr saying is write

I try to be the simplest him my word and to his cultural origin without any problems

while trying to be as professional as possible, we should learn to speak the local dialect of the people and find easier modes of communicating to them.