link to battlereport which was a reason of ban: http://battlelog.battlefield.com/bf4/battlereport/show/1/938540517745825984/273665345/

In that game, I used XM25 from 2 positions mainly as a RU side on B flag: covering the side stairs from the covered position on back stairs, and second pos is front left column, providing cover for the escalators. With XM25's splash damage and rapid fire, it isnt hard to ensure area denial to the enemy on those 2 positions. Enemy kept rushing and the XM25 did it's job. Occasionally, i went to back stairs and provided cover for pushing back alleyway with my AR. 

link to my ban: https://bf4db.com/player/ban/273665345

Thank You in advance.

I took a quick look at case and found a ban on your GUID from : https://www.pbbans.com/mbi-view-ban-392376.html

Unless they admit their ban is a mistake, I am not able to remove your ban here.

PBBans logs Punkbuster violations, just like we do. Violations are only triggered by blacklisted software. Ofcourse there could be a false positive. PBBans can investigate this for you.

What is the next step that I have to do in that case? 

Thank you for fast response

On the PBBans page I provided, you will find an appeal button. Click this button and follow the steps they provide. 

For now I have to close and deny your appeal. If your ban is lifted, create a new thread.

APPEAL DENIED