Flipkart — Item missing and flipkart blocked me

I ordered first time on flipkart on 12 march 22. i ordered adidas shoes on their app. i got my parcel deliver on 13 march 22, i unboxed the package and there is nothing inside the box so i started submitting complaint about missing product on app, while doing this process flipkart blocked my account and am unable to login. i called them several times, but i got no resolution from company. they just wasted my time. whenever i called them they given me some time period but nothing happend in that time.