Rectification

Hi,

My client paid advance tax in three installments in A.Y. 2017-18. It is correctly reflected in 26 AS and in the return. But CPC is not considering one installment due to which he got notice to pay tax. I have submitted  rectification request twice under option 1 "tax credit mismatch only" but every time they are not considering it. Now should I request rectification under option 3 "reprocess the case"

Please help.Thanks.