Dear max_retailer,
Greetings from team eBay!
With regards to the issue faced by you, we would request you to kindly have your GSTIN and IEC details updated in your eBay account. To know the steps on how to update the details, visit this link and refer to step # 7: https://sellglobal.ebay.in/seller-center/start-selling/
You would also be receiving the details from the concerned team soon. Please keep a watch on your eBay My Messages as well as your eBay registered email address.
Regards,
eBay IN CBT Team