I received a notice u/s 245 of income tax act regarding adjustment of demand raised in A.Y.2016-17 against refund of A.Y. 2026-27. there was a tax credit mismatch in return of 2016-17 but in reality there was no mismatch with form 26AS and i paid half of demand tax but did not file responde then, later in 2018 I filed response and forgot. now the interest is rising on that demand, half tax payment is also not considered and 4 years has also passed to rectify the matter. Is there any way I can rectify it now.

please help