How can I resize a large header using the booster theme?

I am extremely frustrated! I have been working on this for far too long. I cannot publish my site because it looks terrible!

I am using the booster theme. I’ve seen solutions that can paste code to fix it, but this theme doesn’t have the option. Can someone point me in the right direction to fix this?

Thank you!

Hello, please provide link to development store and store password so we can have a look at it. If your theme is stock booster theme I would suggest reaching out to their support.