BRC Duckback — Duckback Raincoat Leakage problem

I bought Duckback raincoat two days ago on 21st August from Sabitri Skybags at Howrah Mullickfatak, today was the first day o[censored]se, but I am not satisfied with the use as I got wet, what's the use of buying a branded product like duckback if rain water leaks in? The velco should have been given in the entire chain line as double protection for which the water got leaked inside and my dress got wet. I don't fill its worth buying at all. I should have opted some other brand like wildcraft.