The battle between OxyContin heiress Joss Sackler and recovering opioid addict Courtney Love rages on.

After Page Six exclusively reported that Love turned down Sackler’s $100,000 offer to attend a fashion show for her line, LBV, Sackler — the wife of Purdue Pharma scion David Sackler, whose family is accused of kicking off the opioid crisis — began posting e-mails from Love’s publicist in which she appeared to ask Sackler for more money to show up.

But Love has countered on her own Instagram, calling Sackler an “a - - hole,” and saying “I asked for a stupid ass amount — 250,000$ to donate to charities.”

She continued, “Your. People. Killed. My. People. Idiot … Come for me Sackler. With your PhD. I got no education. I ate gravel and frozen cockroaches for dessert, I was a junkie by the age of 12 and I’ll be dammed [sic] I beat your f - - king drug for now … coz I’m stupid and tough.”

Sackler’s rep tells us, “The e-mails are really straightforward and viewers should see the truth for themselves: Love’s camp wanted more money,” but we hear there was, as the Hole singer claimed, a discussion about giving the cash to charity.