SCN RECEIVED Notice Under Sec 61-FY 2017.18 - Goods and Services Tax - GST

Hello Sirs, Please guide me on how to address below sequence of events: 31/01/2020 - GSTR-9C Filed for FY 2017-18 28/09/2022 - We received Notice Under Sec 61 ,pointing out discrepancy of ITC CLaimed - difference between GSTR-2A vs GSTR-3B of Rs 75,508 30/09/2022. - Since the same discrepancy had been pointed out to us by our Auditor when submitting Annual GST Return and filing GSTR-9C for the same year, we agreed to the demand and deposited the tax with interest and filed reply via GST ASMT-11 on 30.09.2022 15/03/2023 - We again received a Fresh Notice from Department via GST Portal under Sec 61 , issued by GST Tax Officer,Class II,AVATO, who has not referred to our last reply via GST ASMT-11 or payment of tax and has instead called for voluminous documents - Party Ledgers,Cashbook, Tax Invoices, Purchase Invoices, Purchase/Sales Register Bank Statements for Full Year, Purchase Invoices. My Question : a) if I have already agreed to the earlier demand notice and paid the same and filed my reply via ASMT -11 on 30.9.2022, why is the Department now asking for submission of these voluminious documents ? b) Assuming that they are justified in doing so, though the new SCN does not mention any specific shortfall how does one submit voluminous documents, online ? Thank you for the guidance from Experts on this forum