"Nigger" "Redneck"

So i work in collections....meaning that i'm the one person you hate to hear from......but if your car note is due and you are financed through the autofinance company that i work for, chances are you have heard from me before.....
now working for the company, i have to deal with people who don't want to pay their note......sometimes they make me feel like i forced them into the contract.....but if your credit sucks and you know you can't afford the car, don't get it......get a cheaper car......or just fuckin carpool.....that's what Bush told you to do anyway so you can save on gas.....anyway i've been called all kinds of names working for the company but "nigger" is just not what i want to hear on a daily basis.....
basically i work for a department where i constantly talk to the same customers over and over again because of the way the system is set up.....so i called this customer on Tuesday and he answered the phone and said "look here, nigger, stop calling here" and hung up on me.....he actually said it several times but the fact that he even said it startled the shit out of me....and he called me a "porch monkey" i might add...checked out his account and noticed that he had done the same thing to another one of my coworkers earlier that day (he is black)......anyway, the next day one of my other coworkers calls him and he was freakin nice as hell (she is half hispanic/half white).......i called him today.....he called me a "nigger" again @ the end of every sentence......
now i don't know how he could tell the difference between a "nigger" and a white person over the phone but all i know is that i realized that racism still exists and that ignorance obviously is bliss.....
for the people who know me, i'm very proper when it comes to speaking.....now i do understand sometimes when people say talking "black" or "white"......it might be the fact that as black people we use a lot of slang......but when i'm at work, i'm very professional.....quality assurance is a very serious aspect of my job and i don't plan on losing my job for my choice of words or how i present something to a customer.......
so when someone calls me a "nigger" and they don't even know what i look like.....i'm offended
so when someone calls me a "nigger" and they are just assuming that from my voice.....i'm offended.....
and the fucked up thing is that i've been called a "redneck" too
actually was told to "Vote for Obama"
the N.A.A.C.P actually had a funeral for the word.....they fail to realize that it won't help
Racism is prevalent, people
and i now its prevalent because just like my customer assumed i was black and called me a "nigger", i assumed he was a racist white man.......or should i say a fucking "redneck".