I use
@Dr. Reef. I've learned to be proactive during the order period.
1. Specify and acceptable size in inches, rather than small, med, large. Discuss the order by phone if you can, then place it on the web with a note about size requirements.
2. Check in by email and phone during the quarantine period, particularly near the end.
The last time I called, someone from what I believe is a service answered the phone immediately and transferred me quickly. Seems like emails are returned within a day or two. My last orders were a Blue Tang and a Copperband Butterfly. I always have them shipped to the UPS Hub now and pick them up there. Both fish arrived on time, and were in the size range I specified. They were healthy and are doing well in my tank after several months. The one complaint I had was that both were a little skinny. But, they were healthy and gained weight quickly.
I had fish arrive a couple of times early on that were just way too small. Those little fish just don't seem to ship well though. I got credit for the DOAs without issue.