Hey @awesomeberlin,
Thanks for reaching out! I’m not sure of where you added that original code, so it might be hard for us to offer much help here.
I did check out your events page and it seems like you have added the code in the “Before” and “After” HTML options for The Events Calendar.
To find these options, and therefore to edit them, try heading into your wp-admin then to Events > Settings > Display. Scroll down on this tab and you should see these options and hopefully the ad code there.
Let me know if this helps! 🙂
— George