I really did not expect this thread to be so controversial. Instead of trying to respond to everyone here, I will put a few general points.
Thank you to those that have tried to help. I will give customer service a call.
When I was young and pre-pubescent, my father allowed me to go online for the first time. It was a website called Internet Chess Club. For a month, he stood by me while I played. He taught me that online interactions are not unlike real life interactions. What I choose to do to others online reflects upon my individual character. It speaks about me. I choose to treat others online like they are people. I am not always nice, but I am not always nice in person, either. I do not treat randoms online like they are nothings to verbally abuse as I please. This is just part of having good character.
Verbal abuse is not uncommon in online play. However, that does not make it acceptable. With the anonymity of the internet, we need to think about how we want people to interact with one another. Nearly everyone who posts on GAF values the moderation staff here because they are so strict in enforcing a code of ethical behavior. We will openly say that GAF is the best partially because the team here tries to keep conversations civil. It is worth reflecting on what it really means when people say they are okay with this kind of behavior becoming the norm in online play. In OT, there is a thread about someone horrific bullying - don't phenomena like real bullying originate from these kinds of unchecked behaviors? A person is able to fling vitriol at whoever displeased him. Perhaps next he will SWAT a Twitch streamer, or DDoS a website. These behaviors are interlinked, they are not isolated.
As a teacher, I see a lot of young people that spend their lives online. This is their internet "etiquette". They do not socialize much with real people. They do not know how, because online etiquette does not really exist due to anonymity. They are lacking in social skills. Nearly any teacher you talk to today will speak to the extraordinary lack of social skills the youth of today possess. What if he is 8? Then this is an excellent opportunity for him to learn a little about how to treat others.
Those labeling the player's actions as trash talk are misguided. Trash talk is on the level. It is a kind of banter between two competitors that develops a bond. It begins after some relationship has been established. Random vitriol is not trash talk. Spamming swears and then logging off if not trash talk. It is verbal vomit from rage.
I do not consider myself a victim. I was not angered or upset by the player's verbiage. I saw the writing, was surprised, and simply thought "Well, that's not okay". That was the end of it. It isn't a "big deal", but I am also not going to quit because it will take a little effort to report this person. People need to learn that the internet is not a place for social anarchy. We would all be better off if this was a commonly held notion.