Disappointing. How deep are the rough edges around the crystal? If they are too deep perhaps the case wouldn't have been able to hold the crystal? I have no experience of Bienne, but my experience with STS was positive. The watch still had some dings when I collected it but due to location (lug cover on Mk 11 Speedy) the shape of the case would have been messed up if the ends were receded any futher.
My preference would be to use STS as I can drop and pick up a watch from there, which to me is preferable to risking posting to Bienne.
Hope it gets sorted to your satisfaction.