wrong credit note entry

Fy 17 -18 march
I purchased goods from abc company on invoice. Those goods were defective so i sent them back by issuing same amount invoice from my side as per phone conservation with them.

1. Abc showed their invoice in their march gstr1
2. I showed my invoice in my march gstr1
3. Abc entered a credit note for same amount in their march gstr 1.

I enquired Abc accountant about cn issued. They haven't entered my invoice in their accounts instead they issued a cn and kept it with them only .
 We asked them to cancel cn but they stopped picking our calls since then.

As this will cause me loss of igst worth  rs 13000 , is there any option to help me out here ??