evangeline85 wrote: What can I do to get through this?
First, reconsider your belief that your name was shortened out of jealousy that your name was "long" and "elegant". That is what you want to believe.
Have you considered that at some point it is not the fact a name is "elegant" rather that the name is simply too long to fit on a particular logo or design?
When I travel to South America, people call me Ricardo. But, my name is so much more elegant as Richard. Richard means "King" it means "powerful ruler". Instead, some call me Rick, Richie or Dick. Are they jealous of my name Richard, so they modify it to make me feel bad? No. That would be an ignorant belief on my part to think people are changing my name because they are jealous of how elegant Richard is.
When I interact with people from China, their names are modified to Julia or Sophia and my name is 理查德. Why did they change their names, why do they modify mine? Out of envy, jealousy or because maybe, just maybe it has nothing to do with how elegant a name might be, rather it is simply common sense.
Eleanor is 7 letters, yours is 10. At what point do you think it okay to modify a label on a shirt so as to be able to fit the name? 11, 12, 13 letters? You are saying this is the first time in your entire life you have ever had an issue with your name being a bit too long to fit on a label?
And then there is the issue of Lina is simply easier for kids to pronounce or remember or communicate back and forth. I know a dentist in Ecuador that specializes in kids. She wanted to keep advertising her name as Dr. Miriam Rosario Monterroza. Her close friends called her "Moly", but she felt it inappropriate for her professional business to be referred to as Moly as she is a doctor, a dentist. It took a lot of convincing that kids, children, her patients would respond so much better to calling her Dr. Moly.
The bottom line. You are making a big deal out of nothing. Your name is not who you are. You should be focused on the children, not the label on your shirt.
If you really want, you can go to the camp director and ask who made the shirts. Then you can ask the camp director the reason they shortened your name. I guarantee the camp director will not say they shortened your name out of jealousy that your name was elegant. They will tell you they shortened your name, because kids respond to shorter names better and that your full name was difficult to fit on this particular label.