It's pretty common for a new peacock tank mate to get picked on. Usually thus stops after 2-3 days, but it also depends on the tank mates.
It is also pretty common for Petsmart cichlids to really suck.
I'd let it recover, get it's strength back, I wouldn't worry about it looking pretty ( healing fins) because when you move it back it will go through a similar initiation.
Knowing the size/breeds of it, and all it's tank mates would help.