My only major concern would be that it somehow got to the wrong place. But if it was signed for and the address was correct, I don't think you need to worry. Arturia will make it right - it's just a matter of when.
There are probably quite a few units in for repair which probably explains the delay. Regular communication would be nice, to let you know the status.
When my keyed broke - twice (2 different keys) within a week of purchase, I got out my screwdriver and my superglue. It's held up fine since then. It might be a kludge, but it was faster than returning it to the retailer, and much faster than the repair queue apparently.
Let us know when you get any more info. And it will be a sweet day when your fully functional unit is back in your hands. Hope that is soon!