You have an unpaid debt with no one acknowledging ownershiip.
You also have no credit reporting, thus no basis for a dispute of its accuracy, and no debt collector attempting to collect.
I dont see what you could do, other than send the asserted debt collector a DV, thus preventing them from "finding" the account and reporting without first sending you verification. If they get a DV, they are not required to respond until such time as they choose to pursue collection on the debt, so it may just sit unattended, but at least it will give some assurance against reporting until they step up and assert the debt.
A DV, however, might cause them to dig a bit deeper into their files, verify, report, and pursue the debt. Its always a possibility.
Unless planning to app for new credit and thus concerned about having to inform them that you have unpaid, delinquent debtm which you apparently acknowledge, and the propsepctive creditor is will require its satisfaction as a pre-condition for any approval of new credit, it might be best to waiit for someone to assert debt owed to them.
