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Quentin Miller Calls Out Big Sean ... How You Ghostin' a Ghostwriter???

Quentin Miller says he's utterly disappointed in Big Sean's behavior when it comes time to pass out songwriting credits, because he claims Sean Don went MIA on him.

QM says he and Sean first met through Drake circa 2014 while working on their classic duet, "Blessings." He says Sean was impressed with his input, and recruited Quentin to work on "What You Expect" -- Sean's 2021 joint EP with Hit-Boy.

Things started out smooth ... Quentin says he and Sean got close and frequently bounced ideas off each other. When he noticed "Blessings" had won a BET Award, he figured it spelled prosperity for their future collabs.

But then, 2 weeks before the EP release ... QM says Sean stopped responding to texts, and all future communication went through Sean's management.

To make matters worst, QM claims it took 3 months to get his name on the credits and proper publishing once it was officially released -- without his paperwork being signed.

In hindsight, he says he would’ve asked for cash up-front if he knew it was gonna be a ghostwriter situation, but he thought it was gonna be a legit deal.

We reached out to Big Sean's team to get his side of the studio drama … but haven't heard back yet!!!

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