argue round and round
To argue (about something) in a circuitous, indirect fashion, without an end or satisfactory result. We've argued round and round with the insurance company, and they still haven't paid our claim. Look, we're just arguing round and round at this point. Let's put a pin in the issue and come back to it another time. He is determined to misunderstand me, so that's it—I'm done arguing round and round with him.
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