You'll get your deposit back. The dealer can easily re-allocate that order.
It's a frustrating experience, similar to one I went through last year. Ordered February, built may, reordered because the spec was wrong, finally received car in October. I had a loan S3 from May to October as it was a dealer faux pas that caused the wrong spec, but even so, it was annoying, frustrating and I wouldn't repeat it. Had it not been for the loan car, there is no way I'd have waited that long, and I would happily be driving something else right now.