Non Surgical Rhinoplasty Candidate
I suggest waiting at least 2-4 weeks before trying to reverse this or injecting more. I suggest you see an expert. Best, Dr. Emer.
Sorry you've had such a rough experience. If it's only been 12 hours, there is likely swelling present, and ice might help. That said, you should contact your physician and let him or her know your concerns. This early, the product may be massaged a bit to flatten/smooth it. I believe your post said that Radiesse was used. In that case, the filler can't be dissolved, but there may still be ways to improve your outcome if you are still displeased as the swelling goes down.
Nonsurgical nose job fillers can often be dissolved or modified.
Please call your doctor to set up a recheck.