Good evening Angela and welcome to the Events Calendar Support forum!
Thank you for reaching out to us.
We are sorry to hear about your banners still displaying even after deletion!
We will gladly try to assist you on this topic.
By the looks of it, it sounds like you might have some sort of caching issue (either through a plugin or with your browser).
In any case, as a first troubleshooting step, could you please provide us with your system information as well as the site’s URL in a private reply ?
Have a great day!
Geoff B.