ITR Demand Notice


KF Rookie
I am kind of stuck in a wired situation with a demand notice for AY 2021-22. I received a demand notice against my ITR and promptly responded by making the payment via e-challan. However, being new to the portal, I made a mistake. Instead of paying it as 400 (Demand Payment as Regular Assessment Tax), I paid it under 300 (Self-Assessment Tax) and submitted the response. Consequently, the notice is still marked as open.

Anyone have any idea what to do in such a situation?