"…my agent kept ragging on me at the time…" The dictionary definition of [to rag] is: to make fun of, tease, or criticize constantly. Oldham is using it in another common colloquial sense, which is: to pester, trouble or annoy.

Nanren confirmed it first, but yes, ragging.

Thanks

Yes. "ragging on me", or perhaps equivalently "ragg'in on me" Somewhere between "persistently coercing" through to "tormenting".