Although a complete stranger, I would like to apologize to John Lorenzen. It seems not everyone who works in customer service has what it takes to be superior within their job description. This is not acceptable for those of us who choose customer relations as a career choice, nor acceptable to dehumanize another individual for any reason. Many of us take pride forming trust in the relationships we build.
At the same age, I experienced many of the same struggles and had done nothing to deserve such treatment. Obviously this leaves an unsettling feeling in the pit of my stomach, but you will come to find individuals who will treat you with respect. My words of wisdom that I hope you take to heart is that this type of treatment will only make you a wiser, stronger person. Your character will be defined as a direct result of this behavior. This will help you thrive given the opportunities...embrace them. Not everyone is as belittling and will give you chances to prove yourself as the competent adult that you are.