If they are OC accounts, then only their reporting of derogs, such as a charge-off or collection referral no later than 7 years plus 180 days from DOFD.
The CRA does not delete the accounts based on expiration of credit report exclusion periods for derogs reported under the account.
Have you previously requested deletion of only the derogs, or were your requests for their deletion of the entire account?
If to date you have only requsted deletion of derogs, they might be more willing to delete the entire account. That relieves them of any need for possible updates or need to address any possible disputes over info still reported in the file. They can mothball the account.
You would lose its age in your AAoA calculation, but gain in earlier deletion of all reported derogs......
