[Resolved]  Amazon India — proper invoice not provide of iphone

I had been purchased a iphone 11 from amazon india on 11.09.20. The order no[protected].
They had been gave without imei no invoice on 12.09.20 with said product and a soft copy at my amazon account. Which was i told them on 12.09.20 and request them to provide proper (With imei no/serial no.) invoice. But till date they ware not give the said invoice. I had been several time call them for said invoice, but they every time ask 2-3 days to solve the problem but they do not.
If they not give proper invoice, i can't get warranty facility.
So, they should provide proper invoice or return the said item.