You DO still have the documentation relating to the payoff...correct? (cancelled check, statement of debit payment...whatever) After you paid it off, did they send a final statement that your balance was $0? Make a copy of all related documents.
Try calling them & see if you can fax the documents for removal (immediately) asap. If that does not work...send a copy with a demand they remove. Send CMRRR
BK 7 discharge 06.24.2020 No Fico score at all.