Renault — renault kwid water leakage a major problem

Kwid water leakage problem is a major major issue, i have had this problem for the 2nd time now. Last year the sales person at the workshop assured me that it wouldn't happen again, an and today it has happened again, the cabin is filled with water and the water is so much that it got into my shoes as well.
Also, the sales person told me it's a manufacturing defect and all kwid cars have it so i wouldn't recommend buying it i have wasted good amount of my time to deal with this problem