My galaxy grand 2 is failing to launch after software upgrade

Hi,

Today my phone has downloaded 40 mb update for my kitkat android in samsung grand 2. When I hit the install button , it went to the upgrade mode and then at the end showed error and restarted. it kept restarting and updating and showing an error sign again and again

I treid entering to the recovery mode by pressing the vloume up, menu button and the off power but it launch the same software upgarde above.

Pls help me