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It can take up to 90 days. If you have a letter from them stating they will remove their TL you can mail it to TU and fax it to EQ.
I would give it time.
You have an issue of a private agreement with them for deletion.
Regardless of whether they follow through on that agreement, they have a statutory requirement to, at the least, promptly update their prior reporting to show the debt is paid.
That may take at least one reporting cycle, and is a disputable issue should they not do so.
Lack of their compliance with their additonal promise to delete the entire account is not a disputable issue of inaccuracy in their reporting.
It is also not proper basis for deletion of even the derog in the view of the CRA, let alone the entire account.
I would give them time, and not even dispute directly with them, as it might kill their offer of good will.