Where's the rest of the dough?

That's what the auto brokers Highline Holdings Group are asking 2 Chainz after they accused him of reneging on his deal to pay for a Rolls-Royce Phantom Drophead he ordered.

According to TMZ, the brokers and Chainz agreed on a price of $262,212 for the car, and the rapper already paid a bulk of it. But when it came time to fork over the last $18,317, Chainz refused to pay, said the company. Now they're suing him for the owed money plus interest.

Chainz hasn't responded to any of this yet, but he may do so soon and explain his side of the story.

[Related: 2 Chainz couldn't understand Migos at first.]