He asked for more time, not for forgiveness.
What Iblis requested once he was expelled
Expelled and cursed, Iblis speaks again. He says My Lord, reprieve me until the Day they are resurrected. He calls Allah his Lord, he knows who he is speaking to, and still he asks for time, not mercy.
You know the habit is wrong. You do not ask Allah to free you from it. You ask for a bit more time with it. Just one more year, then I will stop. Ask for the better thing.
I will deal with it later; I just need a little more time.
Asking for time to keep doing wrong is the opposite of asking to be forgiven.
Replace one I will stop later with a short dua today asking Allah to help you stop now.