If you ask me, I’d say it is Clay design agency, I outsourced some banding and web design jobs to them on several occasions and the result was pretty much perfect each and every time. So that’s one option for you. But I have some more. This article might help you to find another famous ux designer https://uxvibes.medium.com/top-ui-ux-user-experience-design-agencies-97f08a383e3c . That’s where I found the Clay company I mentioned before. I hope my answer helps you.