Income Tax Department — Not reflecting demand paid in returns filed

It is over a month since a grievance has been raised. I paid the additional demand for last financial year in DEC 2020, but it is still not reflected in the portal. I have been unable to submit my returns filed last year just because the demand has not being feed into the returns system, but lies in the 26AS form. Would someone look into this on priority? All I hear from the customer care center that they are working to load data, what do we do if you don't reflect the correct data?
Please resolve the data gap asap.