We don't care about a fucking trade off or a major feature or a fucking rap verse or a hook or any form of bartering. This is a job, career, occupation. Do you have a day job? Do you get paid? Yes. Would you have that day job if your employer offered to pay you not by cash, but by bartering services, or not pay you at all? Fuck no.
Employ a graphic designer for his/her services and pay him/her for those services. That's how it works.
There's a 4 letter word that will get you a good graphic design, it's called "Cash." Pay the fuck up.
Good day.