On the one hand this is a bad that this happened to you, because the reasoning is completely idiotic.
On the other hand it can be a learning lesson that it’s better to write your birthday as April 20th, and never as 4/20.
PS: Please name that company publicly. Maybe write a short mail to a website about tech news, like https://arstechnica.com or https://www.wired.com. You could also try the blog https://boingboing.net
Because I want to see Fully Automated Luxury Gay Space Communism happen in my lifetime.