GSTR-1 returns

Venkata Rao Sanumoori (101 Points)

27 March 2024  
Dear Sir,

We have made purchases from other State in the FY21-22. That party filed GSTR-1 returns lately after 1 month. But we have taken IGST input in the same month.
In that late return he filed CGST+SGST instead of IGST(showing in GSTR 1). But In GSTR 2A, we didn't get input. We asked him many times to kindly rectify the invoices. That the party paid the taxes as CGST+ SGST. He didn't respond till now. What will we do?