Neither credit report exclusion nor expiration of your state SOL on debt discharges the debt.
You still owe a debt, and they can still attempt to collect.
You can send a cease communication letter under FDCPA 805(c) if you wish them to cease all communications with you, but a cease communication notice does not extend to reviews of your credit report, for which they still have permssible purpose under FCRA 604 for collection on the debt.
They wish to review your current credit standing, perhaps looking for some application for credit where the creditor may require satisfaciton of any unpaid, delinquent debt as a condtion for any approval of new credit.
