Oh hun I'm sorry =(
We've probably bumped into each other in Shirley! I seem to spend too much time there.
The fish I've got recently from Shirley seem to have been OK, but for a time hubby and I were wary of "the curse of Shirley" as pretty much everything we bought died in a short time.
The male bettas are housed in their plastic bags with oxygen and bagged up in the morning because it's easier for customers and staff. They can have more bettas out on show and in one place. They get unbagged at the end of the day and housed in little tanks out back (apparently).
I'm not sure why this seems to happen there from time to time because they DO quarentine new fish - that I have witnessed.