Does the debt collector now own the debt?
If the original creditor has sold the debt, then they can no longer take any payment.
You can contact the new owner and make a pay for deletion offer, which if accepted will get the collection removed from your credit report.
I'm not sure how to know who owns the debt. The only TL showing is from the CA.
Welcome to the board. Then you want to make the PFD offer to the reporting CA.