Hey sainath!

Do not worry if you have not got a seat  in jossa counselling as you can still participate in the special round of CSAB counselling to participate in CSAB counselling you have to register for the special round from July 24th 2019 to July 26th 2019. CSAB  special round counselling is to fill the vacant seats left in  IIT NIT and GFTI after the initial rounds of counselling .

to know the full counselling procedure follow the given link:

https://engineering.careers360.com/articles/csab-special-round-for-nits-iiits-and-gftis

Hope it helps!