Hmmm? Riccy 325 is the main man on this around here...I have never attempted to alter the action on my viola.
It's something best left for a guitar shop unless you don't mind taking the risk. If all goes wrong you could have a lot more buzzing and/or uneven action.
The bridge will probably have 2 round adjustors either side...You could try raising the one closest to the E and A.
Would be an idea to also report it to the place where you got it from. If bought from a shop, they should sort it out for you if you take it in.