Hey @toni12,
You have removed the Site Title from the header, that is why you are facing such issues.
Adding your site title will give you a much better look at the header.
However, if you aren’t satisfied, then you can communicate with the theme developers via their official support channel.
The theme you are using is Shapely.
Contact them here: https://www.ads-software.com/support/theme/shapely/
Forum volunteers are not given access to custom or commercial products. We encourage you to use the official support venues, as it allows the developers to be aware of issues with their code and gives back to the community in a more robust way. See https://www.ads-software.com/support/guidelines/#do-not-post-about-commercial-products