Dmg bug need help

Hey ,

My wizzard Pewpew deal so low dmg in pvp.
I deal yesterday 3 times higher dmg in pvp .
i crit with my ult yesterday on player 6-7k ( lvl 47 ) and now i deal with a crit 3.5k....
other mages deal on me the same dmg like i yesterday...-.- i dont enjoy battle grounds with so low dmg cant kill anyone
plz help me cant play with this dmg bug ..
i deal normal dmg in town but when i join bg its horrible...

and no one can say its balance and dmg is now lower cause like i already say other mages deal normal dmg on me -.-...

hope the community can help me