Sorry for the delay in response! So in this case, the medical group ordered the wrong item, the vendor sent what the medical group ordered, then the medical group realized they ordered the wrong thing and sent it back.
I can't speak for when payment occurred as I have never worked in ECATS and I'm not sure how their billing works.
This whole situation fell into our hands in contracting when the medical group realized they wouldn't be able to make the new purchase in ECATS.