image banner

[InnovativaShop]

When I created the store, I uploaded a simple banner, but over time I realized that the banner was not suitable, and I am unable to change it. Every time I try to change it, the same one remains. I deleted the banner tab in themes, added another one, and now nothing appears. Is there anyone who can help?

"it was supposed to be like this.

 but it is like this.