Nex 7 Kit lense blurry side at 18mm...

Just got the Nex 7 with kit lense after reading reviews arging that kit lense isn't that bad.

After few shots i noticed that 100% viewing show blurry right side at 18mm wide open...bit disapointed as i bought it as a kit should i return the lense only or i may got worse lense in exchange like returned lense from other unsatisfied kit lense?

Look like the lense is decentered, right side exhibit lot of blur



More obvious when looking at the fence on the right

Do you think i can ask for lense replacement only? since i apply screen protector on the nex, and dont want to risk a reconditionned camera.