Interest u/s 244A on ITR refund u/s 154

For AY 2018-19, I wasn't allowed any IT refund due to Tax Credit Mismatch. The return was filed within due date only.

Now, with the deductor filing corresponding TDS return, IT Dept has approved my refund in rectified ITR u/s 154 on 28.01.2021.

However, ITD has given interest on refund for 1 month only, while interest should be payable for 34 months (01.04.2018 to 28.01.2021).

How to file for rectification of interest u/s 244A?

Thanks